First Steps for multiplayer
Merge branch 'master' into multiplayer

Conflicts:
	src/common/Menu/CMainMenu.cpp
Multiplayer Mode on World Map in Galaxy works!
HUD Displays now for all players in the galaxy engine
First part of the changes for Sprite variants. Note, this does not yet
compile!
Working CG again
Colors for players correctly tinted now...
The HUDs now show correct sprites, so they correctly belong to the
assigned player
HUD Improvements
Platform fixes which allow multiple players to interact
Some enemies now get new colors
Bug fixes with the platforms when using more players
Moving to another version
Bug fixes with sprites and OpenGL
Improved GameOver System for multiple players
Improved camera when using Multiplayer mode
Now, when switching camera, the HUD shows an indicator in galaxy.
Bug fixes
glitch fixes
Bug fixes in Vorticon. Now Multiplayer is more like in Galaxy