Make the styler more generic to handle CSS strings and themes instead of having control of the CSS files itself
Unit tests
When adding a new style theme to the DOM, remove the previous one (if there is one)
Should not remove whole selector if there is non-replaced rule and a valid rule
Removing packageAttribute, as it should only accept a prefix
Merge pull request #4 from Livefyre/up_generic

Supporting themes from all apps and unit tests