DAR-337 - using master db when wall was created during the same request, so notification won't be sent to Empty user
DAR-337 - experimantal performance improvement check for Wall
I'm not sure it's correct for all Wall/Forum requests, so I'll keep watching server logs
DAR-337 - fixing the way Wall uses memcache sync
DAR-337 - experimantal performance improvement check for Wall - small fix
DAR-337 small changes after code review
Merge pull request #926 from Wikia/DAR-337-wall-notifications

Dar 337 wall notifications