Bug 1080419 - Put devDependencies in alphabetical order

This means if |npm install foo --save-dev| is now used in the future,
the diff will be much clearer, since it won't also change the order of
existing entries.

package.json

@@ -6,23 +6,23 @@
     "url": "https://github.com/mozilla/treeherder-ui.git"
   },
   "devDependencies": {
-    "karma": ">=0.12.0",
-    "karma-cli": "0.0.4",
-    "karma-junit-reporter": ">=0.2.1",
-    "karma-coverage": ">=0.2.0",
-    "karma-jasmine": ">=0.1.5",
-    "karma-ng-scenario": ">=0.1.0",
-    "karma-firefox-launcher": ">=0.1.3",
     "grunt": "~0.4.4",
-    "grunt-usemin": "~2.1.1",
-    "grunt-contrib-copy": "~0.5.0",
+    "grunt-angular-templates": "~0.5.7",
+    "grunt-cache-busting": "0.0.10",
+    "grunt-contrib-clean": "^0.5.0",
     "grunt-contrib-concat": "~0.4.0",
+    "grunt-contrib-copy": "~0.5.0",
     "grunt-contrib-cssmin": "^0.9.0",
     "grunt-contrib-uglify": "^0.4.0",
-    "grunt-contrib-clean": "^0.5.0",
     "grunt-filerev": "^0.2.1",
-    "grunt-cache-busting": "0.0.10",
-    "grunt-angular-templates": "~0.5.7"
+    "grunt-usemin": "~2.1.1",
+    "karma": ">=0.12.0",
+    "karma-cli": "0.0.4",
+    "karma-coverage": ">=0.2.0",
+    "karma-firefox-launcher": ">=0.1.3",
+    "karma-jasmine": ">=0.1.5",
+    "karma-junit-reporter": ">=0.2.1",
+    "karma-ng-scenario": ">=0.1.0"
   },
   "scripts": {
     "test": "karma start webapp/config/karma.conf.js --single-run --browsers Firefox"