Merge branch 'filesRepo' into 'master'

CustomModels/channelmodel.cpp

CustomModels/channelmodel.h

CustomModels/messagemodel.cpp

CustomModels/messagemodel.h

engine.pro

persistancelayer.cpp

persistancelayer.h

repos/entities/rocketchatattachment.h

repos/entities/rocketchatchannel.cpp

repos/entities/rocketchatchannel.h

repos/entities/rocketchatmessage.cpp

repos/entities/rocketchatmessage.h

repos/entities/rocketchatreplymessage.h

repos/entities/rocketchatuser.h

repos/filesrepo.cpp

repos/filesrepo.h

rocketchat.cpp

rocketchatserver.cpp

rocketchatserver.h

services/emojiservice.cpp