DAR-875 | Special:CSS handling merge conflicts
added possibility to get categories from master db
refactored one method, changed one parameter in a hook and added failover to master in terms of categories
Merge branch 'DAR-716-categories-fix-no-1' into css-chrome-sprint12
DAR-875 | Special:CSS handling merge conflicts
Merge branch 'css-chrome-sprint12' of github.com:Wikia/app into css-chrome-sprint12
corrected documentation, extracted functionality used in few hooks
manually merged css-chrome-sprint12 into DAR-730 to make it easier to merge on GitHub