Update Jekyll to v2.0.0.

.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:~>1.5.0" "sass:~>3.3.0"
+  - travis_retry gem install --no-document "jekyll:~>2.0.3" "sass:~>3.3.8"
 matrix:
   fast_finish: true
 notifications:

_config.yml

@@ -4,7 +4,7 @@ authors:      Connor Sears
 description:  Build mobile apps with simple HTML, CSS, and JS components.
 
 # Dependencies
-pygments:     true
+highlighter:  pygments
 
 # Permalinks
 permalink:    pretty