Merge branch 'master' of https://git.fairkom.net/chat/RocketChatMobileEngine into deleteRoomsFix

CustomModels/channelmodel.cpp

CustomModels/channelmodel.h

ddpRequests/rocketchatsubscriberoomschanged.cpp

ddpRequests/rocketchatsubscriberoomschanged.h

engine.pro

repos/entities/rocketchatchannel.cpp

repos/entities/rocketchatchannel.h

rocketchat.cpp

rocketchat.h

rocketchatserver.cpp

rocketchatserver.h

rocketchatserverconfig.cpp

rocketchatserverconfig.h

services/messageservice.cpp

services/rocketchatchannelservice.cpp