Added service for getting missed conversations.
Merge branch 'master' of https://github.com/BlueForeverI/DoubleGChat.Services

Conflicts:
	Chat.DataLayer/bin/Debug/Chat.DataLayer.dll
	Chat.DataLayer/bin/Debug/Chat.DataLayer.pdb
	Chat.DataLayer/bin/Debug/Chat.Models.dll
	Chat.DataLayer/bin/Debug/Chat.Models.pdb
	Chat.DataLayer/obj/Debug/Chat.DataLayer.csprojResolveAssemblyReference.cache
	Chat.DataLayer/obj/Debug/Chat.DataLayer.dll
	Chat.DataLayer/obj/Debug/Chat.DataLayer.pdb
	Chat.Models/bin/Debug/Chat.Models.dll
	Chat.Models/bin/Debug/Chat.Models.pdb
	Chat.Models/obj/Debug/Chat.Models.dll
	Chat.Models/obj/Debug/Chat.Models.pdb
	Chat.Repositories/bin/Debug/Chat.DataLayer.dll
	Chat.Repositories/bin/Debug/Chat.DataLayer.pdb
	Chat.Repositories/bin/Debug/Chat.Models.dll
	Chat.Repositories/bin/Debug/Chat.Models.pdb
	Chat.Repositories/bin/Debug/Chat.Repositories.dll
	Chat.Repositories/bin/Debug/Chat.Repositories.pdb
	Chat.Repositories/obj/Debug/Chat.Repositories.csprojResolveAssemblyReference.cache
	Chat.Repositories/obj/Debug/Chat.Repositories.dll
	Chat.Repositories/obj/Debug/Chat.Repositories.pdb
	Chat.Services/bin/Chat.DataLayer.dll
	Chat.Services/bin/Chat.DataLayer.pdb
	Chat.Services/bin/Chat.Models.dll
	Chat.Services/bin/Chat.Models.pdb
	Chat.Services/bin/Chat.Repositories.dll
	Chat.Services/bin/Chat.Repositories.pdb
	Chat.Services/bin/Chat.Services.dll
	Chat.Services/bin/Chat.Services.pdb
	Chat.Services/obj/Debug/Chat.Services.csprojResolveAssemblyReference.cache
	Chat.Services/obj/Debug/Chat.Services.dll
	Chat.Services/obj/Debug/Chat.Services.pdb
	DoubleGChat.Services.v11.suo