Update dependencies and Jekyll version.

.travis.yml

@@ -6,7 +6,7 @@ before_install:
 install:
   - travis_retry npm install -g grunt-cli
   - travis_retry npm install
-  - travis_retry gem install --no-document "jekyll:~>2.0.3" "sass:~>3.3.8"
+  - travis_retry gem install --no-document "jekyll:~>2.2.0" "sass:~>3.3.12"
 matrix:
   fast_finish: true
 notifications:

package.json

@@ -27,19 +27,19 @@
   },
   "devDependencies": {
     "grunt": "~0.4.5",
-    "grunt-contrib-clean": "~0.5.0",
-    "grunt-contrib-concat": "~0.4.0",
+    "grunt-contrib-clean": "~0.6.0",
+    "grunt-contrib-concat": "~0.5.0",
     "grunt-contrib-copy": "~0.5.0",
     "grunt-contrib-csslint": "~0.2.0",
     "grunt-contrib-cssmin": "~0.10.0",
     "grunt-contrib-jshint": "~0.10.0",
     "grunt-contrib-sass": "~0.7.3",
-    "grunt-contrib-uglify": "~0.5.0",
+    "grunt-contrib-uglify": "~0.5.1",
     "grunt-contrib-watch": "~0.6.1",
-    "grunt-csscomb": "~3.0.0-1",
+    "grunt-csscomb": "~3.0.0",
     "grunt-html-validation": "~0.1.18",
     "grunt-jekyll": "~0.4.2",
-    "grunt-jscs": "~0.6.1",
+    "grunt-jscs": "~0.6.2",
     "grunt-sed": "~0.1.1",
     "load-grunt-tasks": "~0.6.0",
     "time-grunt": "~0.4.0"