Added Solarized theme for Mou
Mou Theme and CSS can be configured using puppet.
Fixed problem with theme files not being copied
Merge branch 'feature_themes' into feature_preferences

* feature_themes:
  Fixed problem with theme files not being copied
Fixed mou::config class design. Prefences are now handled using mou::preferences class.
Fixed mou::config class declaration. Changed mou::preferences type.
Updated ruby gems.
Added rspec for mou_preferences.
Updated puppet boxen dependency version.
Added Github API Token