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)
BAC-352: Redirects in shared repository don't work

* try to follow redirects before foreign repos are checked
* add profiling for wfFindFile function
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
BAC-589: improve images popularity in ImageServing

Add a query that gets all images being redirect to an image we're getting popularity for
PLA-467 handling no image cases
PLA-467 adding filtering for articles that should be dispalyed