Made sure all entities created have the fog_enable flag enabled
Added JSON kit to the server sources
Added a new Event Receiver for the main menu.
Changed the main loop of the engine so that iirlicht GUI can be drawn succesfully.

- Changed the MainMenuEventReceiver class

Many thanks to Rik for the help !! :)
Merge branch 'Developer' into Engine

Conflicts:
	bin/Stella Incognita Debug.exe
	build/Stella Incognita.vcxproj
	build/Stella Incognita.vcxproj.filters
	lib/EngineDebug/engine.lib
	lib/EngineRelease/engine.lib
	source/Engine/Game.cpp
	source/Game/main.cpp
Created a new filter for the developer. Rebuild the engine as build and release.

Working developer branch. Fixed GUI.
Main menu is the first scene that starts.