ArticlesApiController: PHP hinting
ImageServingController: use JSON format by default
ImageServing: cache images with maximum limit

ImageServing::getImages() will take a slice when getting data from cache
ImageServing: mark getThumbnails() as deprecated
Correctly parse user.user_birthdate from DB
Add user birthdate to Special:LookupUser
Add i18n messages for Special:LookupUser
Use $wgLang->date() instead of $wgLang->timeanddate()
BAC-576: importWikicities.php

Implement wikicities db sync from production to dev-db-central
Merge branch 'dev' into bac-734-image-serving-results-caching

Conflicts:
	extensions/wikia/ImageServing/drivers/ImageServingDriverBase.class.php
	extensions/wikia/ImageServing/drivers/ImageServingDriverUserNS.class.php
Add some colors to Special:AbTesting page; add general information about currently used GA Slots
Minor changes suggested after in-team Code Review
Minor refactor
Remove zero state of Forum related discussions module
Add scheduled informations
Forgot to sort future GA slots
Obsolete styling in controller
Remove RelatedForumDiscussions zero-state css (VOLDEV-46)
Adding variable indicating the need to show toc
Define toc module and serve the indicator to show it or not