diff --git a/package-lock.json b/package-lock.json
index 88001dc..990856d 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -2,6 +2,7 @@
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@@ -14,6 +15,9 @@
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-      "dev": true
+      "dev": true,
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-      "dev": true
+      "dev": true,
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       "integrity": "sha1-mjRBDk9OPaI96jdb5b5w8kd47Dk=",
-      "dev": true
+      "dev": true,
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-      "dev": true
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       "dev": true,
-      "optional": true
+      "optional": true,
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-      "dev": true
+      "dev": true,
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-      "dev": true
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-      "dev": true
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-      "dev": true
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-      "dev": true
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-      "dev": true
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-      "dev": true
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-      "dev": true
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-      "dev": true
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-      "dev": true
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+        "lcov-parse": "0.0.10",
+        "log-driver": "1.2.5",
+        "minimist": "1.2.0",
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-      "dev": true
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-      "dev": true
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-      "dev": true
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-      "optional": true
+      "optional": true,
+      "requires": {
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+      }
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       "integrity": "sha1-jjGcnwRTv1ddN0lAplWSDlnKVRI=",
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@@ -964,7 +1354,10 @@
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@@ -999,37 +1395,83 @@
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@@ -1120,12 +1592,19 @@
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@@ -1140,17 +1619,26 @@
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+            "is-arrayish": "0.2.1"
+          }
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@@ -1165,17 +1653,26 @@
         "expand-brackets": {
           "version": "0.1.5",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "requires": {
+            "is-posix-bracket": "0.1.1"
+          }
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         "expand-range": {
           "version": "1.8.2",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "requires": {
+            "fill-range": "2.2.3"
+          }
         },
         "extglob": {
           "version": "0.3.2",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "requires": {
+            "is-extglob": "1.0.0"
+          }
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           "version": "2.0.1",
@@ -1185,17 +1682,33 @@
         "fill-range": {
           "version": "2.2.3",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "requires": {
+            "is-number": "2.1.0",
+            "isobject": "2.1.0",
+            "randomatic": "1.1.6",
+            "repeat-element": "1.1.2",
+            "repeat-string": "1.6.1"
+          }
         },
         "find-cache-dir": {
           "version": "0.1.1",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "requires": {
+            "commondir": "1.0.1",
+            "mkdirp": "0.5.1",
+            "pkg-dir": "1.0.0"
+          }
         },
         "find-up": {
           "version": "1.1.2",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "requires": {
+            "path-exists": "2.1.0",
+            "pinkie-promise": "2.0.1"
+          }
         },
         "for-in": {
           "version": "1.0.2",
@@ -1205,12 +1718,19 @@
         "for-own": {
           "version": "0.1.5",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "requires": {
+            "for-in": "1.0.2"
+          }
         },
         "foreground-child": {
           "version": "1.5.6",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "requires": {
+            "cross-spawn": "4.0.2",
+            "signal-exit": "3.0.2"
+          }
         },
         "fs.realpath": {
           "version": "1.0.0",
@@ -1225,17 +1745,32 @@
         "glob": {
           "version": "7.1.1",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "requires": {
+            "fs.realpath": "1.0.0",
+            "inflight": "1.0.6",
+            "inherits": "2.0.3",
+            "minimatch": "3.0.3",
+            "once": "1.4.0",
+            "path-is-absolute": "1.0.1"
+          }
         },
         "glob-base": {
           "version": "0.3.0",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "requires": {
+            "glob-parent": "2.0.0",
+            "is-glob": "2.0.1"
+          }
         },
         "glob-parent": {
           "version": "2.0.0",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "requires": {
+            "is-glob": "2.0.1"
+          }
         },
         "globals": {
           "version": "9.17.0",
@@ -1251,18 +1786,30 @@
           "version": "4.0.8",
           "bundled": true,
           "dev": true,
+          "requires": {
+            "async": "1.5.2",
+            "optimist": "0.6.1",
+            "source-map": "0.4.4",
+            "uglify-js": "2.8.22"
+          },
           "dependencies": {
             "source-map": {
               "version": "0.4.4",
               "bundled": true,
-              "dev": true
+              "dev": true,
+              "requires": {
+                "amdefine": "1.0.1"
+              }
             }
           }
         },
         "has-ansi": {
           "version": "2.0.0",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "requires": {
+            "ansi-regex": "2.1.1"
+          }
         },
         "has-flag": {
           "version": "1.0.0",
@@ -1282,7 +1829,11 @@
         "inflight": {
           "version": "1.0.6",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "requires": {
+            "once": "1.4.0",
+            "wrappy": "1.0.2"
+          }
         },
         "inherits": {
           "version": "2.0.3",
@@ -1292,7 +1843,10 @@
         "invariant": {
           "version": "2.2.2",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "requires": {
+            "loose-envify": "1.3.1"
+          }
         },
         "invert-kv": {
           "version": "1.0.0",
@@ -1312,7 +1866,10 @@
         "is-builtin-module": {
           "version": "1.0.0",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "requires": {
+            "builtin-modules": "1.1.1"
+          }
         },
         "is-dotfile": {
           "version": "1.0.2",
@@ -1322,7 +1879,10 @@
         "is-equal-shallow": {
           "version": "0.1.3",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "requires": {
+            "is-primitive": "2.0.0"
+          }
         },
         "is-extendable": {
           "version": "0.1.1",
@@ -1337,22 +1897,34 @@
         "is-finite": {
           "version": "1.0.2",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "requires": {
+            "number-is-nan": "1.0.1"
+          }
         },
         "is-fullwidth-code-point": {
           "version": "1.0.0",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "requires": {
+            "number-is-nan": "1.0.1"
+          }
         },
         "is-glob": {
           "version": "2.0.1",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "requires": {
+            "is-extglob": "1.0.0"
+          }
         },
         "is-number": {
           "version": "2.1.0",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "requires": {
+            "kind-of": "3.2.0"
+          }
         },
         "is-posix-bracket": {
           "version": "0.1.1",
@@ -1382,7 +1954,10 @@
         "isobject": {
           "version": "2.1.0",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "requires": {
+            "isarray": "1.0.0"
+          }
         },
         "istanbul-lib-coverage": {
           "version": "1.1.0",
@@ -1392,34 +1967,65 @@
         "istanbul-lib-hook": {
           "version": "1.0.6",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "requires": {
+            "append-transform": "0.4.0"
+          }
         },
         "istanbul-lib-instrument": {
           "version": "1.7.1",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "requires": {
+            "babel-generator": "6.24.1",
+            "babel-template": "6.24.1",
+            "babel-traverse": "6.24.1",
+            "babel-types": "6.24.1",
+            "babylon": "6.17.0",
+            "istanbul-lib-coverage": "1.1.0",
+            "semver": "5.3.0"
+          }
         },
         "istanbul-lib-report": {
           "version": "1.1.0",
           "bundled": true,
           "dev": true,
+          "requires": {
+            "istanbul-lib-coverage": "1.1.0",
+            "mkdirp": "0.5.1",
+            "path-parse": "1.0.5",
+            "supports-color": "3.2.3"
+          },
           "dependencies": {
             "supports-color": {
               "version": "3.2.3",
               "bundled": true,
-              "dev": true
+              "dev": true,
+              "requires": {
+                "has-flag": "1.0.0"
+              }
             }
           }
         },
         "istanbul-lib-source-maps": {
           "version": "1.2.0",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "requires": {
+            "debug": "2.6.6",
+            "istanbul-lib-coverage": "1.1.0",
+            "mkdirp": "0.5.1",
+            "rimraf": "2.6.1",
+            "source-map": "0.5.6"
+          }
         },
         "istanbul-reports": {
           "version": "1.1.0",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "requires": {
+            "handlebars": "4.0.8"
+          }
         },
         "js-tokens": {
           "version": "3.0.1",
@@ -1434,7 +2040,10 @@
         "kind-of": {
           "version": "3.2.0",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "requires": {
+            "is-buffer": "1.1.5"
+          }
         },
         "lazy-cache": {
           "version": "1.0.4",
@@ -1445,12 +2054,22 @@
         "lcid": {
           "version": "1.0.0",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "requires": {
+            "invert-kv": "1.0.0"
+          }
         },
         "load-json-file": {
           "version": "1.1.0",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "requires": {
+            "graceful-fs": "4.1.11",
+            "parse-json": "2.2.0",
+            "pify": "2.3.0",
+            "pinkie-promise": "2.0.1",
+            "strip-bom": "2.0.0"
+          }
         },
         "lodash": {
           "version": "4.17.4",
@@ -1465,17 +2084,27 @@
         "loose-envify": {
           "version": "1.3.1",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "requires": {
+            "js-tokens": "3.0.1"
+          }
         },
         "lru-cache": {
           "version": "4.0.2",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "requires": {
+            "pseudomap": "1.0.2",
+            "yallist": "2.1.2"
+          }
         },
         "md5-hex": {
           "version": "1.3.0",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "requires": {
+            "md5-o-matic": "0.1.1"
+          }
         },
         "md5-o-matic": {
           "version": "0.1.1",
@@ -1485,17 +2114,38 @@
         "merge-source-map": {
           "version": "1.0.3",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "requires": {
+            "source-map": "0.5.6"
+          }
         },
         "micromatch": {
           "version": "2.3.11",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "requires": {
+            "arr-diff": "2.0.0",
+            "array-unique": "0.2.1",
+            "braces": "1.8.5",
+            "expand-brackets": "0.1.5",
+            "extglob": "0.3.2",
+            "filename-regex": "2.0.1",
+            "is-extglob": "1.0.0",
+            "is-glob": "2.0.1",
+            "kind-of": "3.2.0",
+            "normalize-path": "2.1.1",
+            "object.omit": "2.0.1",
+            "parse-glob": "3.0.4",
+            "regex-cache": "0.4.3"
+          }
         },
         "minimatch": {
           "version": "3.0.3",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "requires": {
+            "brace-expansion": "1.1.7"
+          }
         },
         "minimist": {
           "version": "0.0.8",
@@ -1505,7 +2155,10 @@
         "mkdirp": {
           "version": "0.5.1",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "requires": {
+            "minimist": "0.0.8"
+          }
         },
         "ms": {
           "version": "0.7.3",
@@ -1515,12 +2168,21 @@
         "normalize-package-data": {
           "version": "2.3.8",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "requires": {
+            "hosted-git-info": "2.4.2",
+            "is-builtin-module": "1.0.0",
+            "semver": "5.3.0",
+            "validate-npm-package-license": "3.0.1"
+          }
         },
         "normalize-path": {
           "version": "2.1.1",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "requires": {
+            "remove-trailing-separator": "1.0.1"
+          }
         },
         "number-is-nan": {
           "version": "1.0.1",
@@ -1535,17 +2197,28 @@
         "object.omit": {
           "version": "2.0.1",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "requires": {
+            "for-own": "0.1.5",
+            "is-extendable": "0.1.1"
+          }
         },
         "once": {
           "version": "1.4.0",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "requires": {
+            "wrappy": "1.0.2"
+          }
         },
         "optimist": {
           "version": "0.6.1",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "requires": {
+            "minimist": "0.0.8",
+            "wordwrap": "0.0.3"
+          }
         },
         "os-homedir": {
           "version": "1.0.2",
@@ -1555,22 +2228,37 @@
         "os-locale": {
           "version": "1.4.0",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "requires": {
+            "lcid": "1.0.0"
+          }
         },
         "parse-glob": {
           "version": "3.0.4",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "requires": {
+            "glob-base": "0.3.0",
+            "is-dotfile": "1.0.2",
+            "is-extglob": "1.0.0",
+            "is-glob": "2.0.1"
+          }
         },
         "parse-json": {
           "version": "2.2.0",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "requires": {
+            "error-ex": "1.3.1"
+          }
         },
         "path-exists": {
           "version": "2.1.0",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "requires": {
+            "pinkie-promise": "2.0.1"
+          }
         },
         "path-is-absolute": {
           "version": "1.0.1",
@@ -1585,7 +2273,12 @@
         "path-type": {
           "version": "1.1.0",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "requires": {
+            "graceful-fs": "4.1.11",
+            "pify": "2.3.0",
+            "pinkie-promise": "2.0.1"
+          }
         },
         "pify": {
           "version": "2.3.0",
@@ -1600,12 +2293,18 @@
         "pinkie-promise": {
           "version": "2.0.1",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "requires": {
+            "pinkie": "2.0.4"
+          }
         },
         "pkg-dir": {
           "version": "1.0.0",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "requires": {
+            "find-up": "1.1.2"
+          }
         },
         "preserve": {
           "version": "0.2.0",
@@ -1620,17 +2319,30 @@
         "randomatic": {
           "version": "1.1.6",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "requires": {
+            "is-number": "2.1.0",
+            "kind-of": "3.2.0"
+          }
         },
         "read-pkg": {
           "version": "1.1.0",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "requires": {
+            "load-json-file": "1.1.0",
+            "normalize-package-data": "2.3.8",
+            "path-type": "1.1.0"
+          }
         },
         "read-pkg-up": {
           "version": "1.0.1",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "requires": {
+            "find-up": "1.1.2",
+            "read-pkg": "1.1.0"
+          }
         },
         "regenerator-runtime": {
           "version": "0.10.5",
@@ -1640,7 +2352,11 @@
         "regex-cache": {
           "version": "0.4.3",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "requires": {
+            "is-equal-shallow": "0.1.3",
+            "is-primitive": "2.0.0"
+          }
         },
         "remove-trailing-separator": {
           "version": "1.0.1",
@@ -1660,7 +2376,10 @@
         "repeating": {
           "version": "2.0.1",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "requires": {
+            "is-finite": "1.0.2"
+          }
         },
         "require-directory": {
           "version": "2.1.1",
@@ -1681,12 +2400,18 @@
           "version": "0.1.3",
           "bundled": true,
           "dev": true,
-          "optional": true
+          "optional": true,
+          "requires": {
+            "align-text": "0.1.4"
+          }
         },
         "rimraf": {
           "version": "2.6.1",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "requires": {
+            "glob": "7.1.1"
+          }
         },
         "semver": {
           "version": "5.3.0",
@@ -1717,6 +2442,14 @@
           "version": "1.2.4",
           "bundled": true,
           "dev": true,
+          "requires": {
+            "foreground-child": "1.5.6",
+            "mkdirp": "0.5.1",
+            "os-homedir": "1.0.2",
+            "rimraf": "2.6.1",
+            "signal-exit": "2.1.2",
+            "which": "1.2.14"
+          },
           "dependencies": {
             "signal-exit": {
               "version": "2.1.2",
@@ -1728,7 +2461,10 @@
         "spdx-correct": {
           "version": "1.0.2",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "requires": {
+            "spdx-license-ids": "1.2.2"
+          }
         },
         "spdx-expression-parse": {
           "version": "1.0.4",
@@ -1743,17 +2479,28 @@
         "string-width": {
           "version": "1.0.2",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "requires": {
+            "code-point-at": "1.1.0",
+            "is-fullwidth-code-point": "1.0.0",
+            "strip-ansi": "3.0.1"
+          }
         },
         "strip-ansi": {
           "version": "3.0.1",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "requires": {
+            "ansi-regex": "2.1.1"
+          }
         },
         "strip-bom": {
           "version": "2.0.0",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "requires": {
+            "is-utf8": "0.2.1"
+          }
         },
         "supports-color": {
           "version": "2.0.0",
@@ -1763,7 +2510,14 @@
         "test-exclude": {
           "version": "4.1.0",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "requires": {
+            "arrify": "1.0.1",
+            "micromatch": "2.3.11",
+            "object-assign": "4.1.1",
+            "read-pkg-up": "1.0.1",
+            "require-main-filename": "1.0.1"
+          }
         },
         "to-fast-properties": {
           "version": "1.0.3",
@@ -1780,12 +2534,23 @@
           "bundled": true,
           "dev": true,
           "optional": true,
+          "requires": {
+            "source-map": "0.5.6",
+            "uglify-to-browserify": "1.0.2",
+            "yargs": "3.10.0"
+          },
           "dependencies": {
             "yargs": {
               "version": "3.10.0",
               "bundled": true,
               "dev": true,
-              "optional": true
+              "optional": true,
+              "requires": {
+                "camelcase": "1.2.1",
+                "cliui": "2.1.0",
+                "decamelize": "1.2.0",
+                "window-size": "0.1.0"
+              }
             }
           }
         },
@@ -1798,12 +2563,19 @@
         "validate-npm-package-license": {
           "version": "3.0.1",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "requires": {
+            "spdx-correct": "1.0.2",
+            "spdx-expression-parse": "1.0.4"
+          }
         },
         "which": {
           "version": "1.2.14",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "requires": {
+            "isexe": "2.0.0"
+          }
         },
         "which-module": {
           "version": "1.0.0",
@@ -1824,7 +2596,11 @@
         "wrap-ansi": {
           "version": "2.1.0",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "requires": {
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