Method GetCurrentMainMenu

Method which return the current main menu
Merge branch 'jsonrpcextension' of github.com:NicolasAfonso/xbmc into jsonrpcextension

Conflicts:
	xbmc/interfaces/json-rpc/GUIOperations.cpp
	xbmc/interfaces/json-rpc/GUIOperations.h
	xbmc/interfaces/json-rpc/JSONServiceDescription.cpp
	xbmc/interfaces/json-rpc/ServiceDescription.h