Compress Jekyll assets by YUI compressor.

Gemfile

@@ -5,3 +5,4 @@ gem 'pygments.rb', '~> 0.5.4'
 gem 'jekyll-assets'
 gem 'less'
 gem 'therubyracer'
+gem 'yui-compressor'

Gemfile.lock

@@ -63,6 +63,7 @@ GEM
     toml (0.1.0)
       parslet (~> 1.5.0)
     yajl-ruby (1.1.0)
+    yui-compressor (0.12.0)
 
 PLATFORMS
   ruby
@@ -73,3 +74,4 @@ DEPENDENCIES
   less
   pygments.rb (~> 0.5.4)
   therubyracer
+  yui-compressor

_config.yml

@@ -10,3 +10,14 @@ keep_files:  ['.gitkeep']
 encoding: UTF-8
 markdown: redcarpet
 gems:     ['jekyll-assets']
+
+#
+# Plugin: jekyll-assets
+#
+assets:
+  #
+  # Sets compressors. No compression by default.
+  #
+  compress:
+    js:  yui
+    css: yui