Merge branch 'UserQuotaFunction' of https://github.com/strk/cartodb into CDB-2893
Merge branch 'master' into CDB-2893
CDB-2893 Ongoing add of user_id to visualization model. Unfinished, this will break for sure
Merge branch 'master' into CDB-2893
CDB-2893 Added user_id on vis creation and more code cleaning. Still ongoing but things should be more stable
CDB-2893 more fixes and safety checks
CDB-2893 added validation check + spec
Merge branch 'master' into CDB-2893
CDB-2893 Branch stabilization
CDB-2893 proper doc of the rake
Merge branch 'master' into CDB-2893
CDB-2893 Filled NEWS.md
CDB-2893 Copying from CDB-2999: Transplanted rake populate vis.user_id to rails migration
Merge pull request #476 from CartoDB/CDB-2893

Also tested at dev & stating + last commit is the same as CDB-2999