Added SetDoDaylightCycle() and IsDaylightCycleEnabled() to cWorld.
I need this for a GameRule plugin.
Renamed m_DoDaylightCycle to m_CycleDaylight.
Merge branch 'master' into LuaAPI
Renamed functions.
Added IsDaylightCycleEnabled saving.
Added a comment and simplified code.
Exported daylight cycle flag to the protocol.
Merge pull request #1296 from mc-server/LuaAPI

Added SetDoDaylightCycle() and IsDaylightCycleEnabled() to cWorld.