Update coveralls gem

Gemfile.lock

@@ -47,15 +47,15 @@ GEM
       net-sftp (>= 2.0.0)
       net-ssh (>= 2.0.14)
       net-ssh-gateway (>= 1.1.0)
-    colorize (0.5.8)
-    coveralls (0.6.7)
-      colorize
+    coveralls (0.7.0)
       multi_json (~> 1.3)
       rest-client
       simplecov (>= 0.7)
+      term-ansicolor
       thor
     daemons (1.1.9)
     diff-lcs (1.2.4)
+    docile (1.1.3)
     erubis (2.7.0)
     eventmachine (1.0.3)
     faraday (0.8.7)
@@ -74,8 +74,8 @@ GEM
     mail (2.5.4)
       mime-types (~> 1.16)
       treetop (~> 1.4.8)
-    mime-types (1.23)
-    multi_json (1.7.5)
+    mime-types (1.25.1)
+    multi_json (1.8.4)
     multipart-post (1.2.0)
     net-http-persistent (2.8)
     net-scp (1.1.1)
@@ -139,23 +139,27 @@ GEM
       rspec-mocks (~> 2.13.0)
     shoulda-matchers (2.1.0)
       activesupport (>= 3.0.0)
-    simplecov (0.7.1)
-      multi_json (~> 1.0)
-      simplecov-html (~> 0.7.1)
-    simplecov-html (0.7.1)
+    simplecov (0.8.2)
+      docile (~> 1.1.0)
+      multi_json
+      simplecov-html (~> 0.8.0)
+    simplecov-html (0.8.0)
     simplecov-rcov (0.2.3)
       simplecov (>= 0.4.1)
     sprockets (2.2.2)
       hike (~> 1.2)
       multi_json (~> 1.0)
       rack (~> 1.0)
       tilt (~> 1.1, != 1.3.0)
+    term-ansicolor (1.2.2)
+      tins (~> 0.8)
     thin (1.5.1)
       daemons (>= 1.0.9)
       eventmachine (>= 0.12.6)
       rack (>= 1.0.0)
     thor (0.18.1)
     tilt (1.4.1)
+    tins (0.13.2)
     tire (0.5.8)
       activemodel (>= 3.0)
       activesupport