DAR-1732 removing unused call to wall notifications
DAR-1732 adding wall profiling calls
DAR-1732 fixing silly bug - in case of no notifications, db was used instead of the cache
DAR-1732 when getWikiNotifications does not find the data in memcache, put it there after querying the database
DAR-1732 adding WallNotifications::getData method comment
DAR-1732 wall notification fix: app should be in lowercase
DAR-1732 using lockAndSetData in WallNotifications::addNotificationLinkInternal
DAR-1732 using lockAndSetData in WallNotifications::remNotificationsForUniqueID
DAR-1732 fix: lockAndSetData callback should return a value
DAR-1732 using lockAndSetData in WallNotifications::markRead
DAR-1732 replacing wgMesgExt with wfMessage in wall controller
DAR-1732 Wall: replacing getGlobal calls with wg->
DAR-1732 missing indentation
Merge pull request #1570 from Wikia/DAR-1732

Dar 1732 - wall notifications performance