PLA-489 current progress getting backend in order
PLA-489 created experimental partial to integrate with back end, got some categories working (depending on cache)
PLA-510 handling multiple ab groups
Merge branch 'dev' into PLA-467

Conflicts:
	extensions/wikia/Search/WikiaSearch.i18n.php
PLA-467 changes due to frontend work
PLA-467 setting the structure
PLA-467 css changes
PLA-467 css changes
PLA-467 css changes
PLA-467 click tracking template changes
PLA-467 click tracking for category module
Merge branch 'PLA-510' into PLA-467
PLA-467 setting as AB test
PLA-467 setting ab test check in templates
PLA-467 removing useless rule, css changes
PLA-467 removing category translation
PLA-467 handling no image cases
PLA-467 adding filtering for articles that should be dispalyed
PLA-467 category tracking name changed
Merge branch 'dev' into PLA-467