Prepare for trouble! ... And make it double! ...
New class for managing the osg objects and their physical representations. (Really necessary for particles later)
The objects can now be created via an objectwrapper. That works fine but openSceneGraph crashes if you create new objects AFTER having the viewer started.
clean ups
Merge remote-tracking branch 'origin/osgTest' into osgTerrainTest

Conflicts:
	src/game.cpp
	src/game.h