Relative timestamps
wfMsg -> wfMessage, removed wfTimestamp(TS_MW, $stuff)
PLA-795: return 404 on API calls to nonexisting controllers
PLA-795: 404 on wrong API method name, fixed unit tests
VE-389: set up initial panel layout for the media insertion tool.
DAR-2191 Added script to read opacity settings from ThemeDesigner
DAR-2129: Fixed links in CSS Updates blog post on Special:CSS
DAR-2130 | UserSignup - fixed redirect
DAR-2122 | Global header removed sampling for global header tracking
DAR-2122 | GlobalNav tracking only in ABTesting groups
DAR-1688 Store background image size in ThemeSettings if it's not set

This avoids call to wfFindFile on each call to getOasisSettings
when background image data is not set; instead, we populate
those fields so the situation will not repeat itself in future.

https://wikia-inc.atlassian.net/browse/DAR-1688
DAR-2129: Change local links to interwiki links
DAR-2129: Changed regex pattern and move some logic to function
DAR-2129: Unit tests for changing local links to interwiki links
DAR-2129: Removed WikiaDataAccess::REFRESH_CACHE
Initial wrapper for media query
QAART-248 ScavengerHuntAddItemToCacheTest skipped
Merge branch 'dev' into ve-sprint-4
Merge branch 've-sprint-4' into VE-389
VE-389: implement PagedLayout inside the MediaInsertionDialog.