Added messages migration
Added chatrooms migration
Modified create_chatrooms migration
Added chatroom_members migration
Added banned_chatroom_members migration
Added chatroom_log migrations
Added create_activities migration
Added temporary migration for activity tags
adding table events
adding columns to table events
modify events
adding photos table
adding video table
Merge branch 'migrations' into C3_S0_Uploading_photos_form
Issue #57 fixing stack problem