Remove unused WikiaTracker files (config has been moved to AbTest).
WikiaTracker: refactor trackEvent into track.
WikiaTracker: remove config, use tracker group.
Fix typos.
WikiaTracker: add data key remapping.
WikiaTracker: allow passing trackingMethod and eventName outside of data parameter.
WikiaTracker: update calls to trackEvent to new method.
WikiaTracker: update spooling code, fix data not being processed correctly.
WikiaTracker: trackAdEvent -> track('ad')
WikiaTracker: add version to tracking spooling js mcache key.
Remove redundant object merging.
WikiaTracker: remove eventName as optional second parameter.
Refactor tracking calls which used the eventName param.
WikiaTracker: remove trackingMethod as a named parameter.
Merge branch 'dev' into wikiatracker-track

Conflicts:
	extensions/wikia/WikiaTracker/js/WikiaTracker.js
WikiaTracker: update buildTrackingFunction calls.
WikiaTracker: don't manipulate objects directly, clone instead.
Remove console.log
Revert "Merge branch 'bugid-95971' into dev" this fix introduced another regression; reverting it and going to implement better fix

This reverts commit f66dad8551f5aa09f37cd7f2628064e365f80589, reversing
changes made to 0d6ad6356e6179ddad8344586764533e9b4ea2aa.
new JS asset added only in UserLoginSpecialController::index() method as a quick fix for P2