Use renamed BodyNode::get/set Shape API.

BodyNode's Shapes getters and setters were extended, e.g.
getVisualizationShape and getCollisionShape.
Disable visualization of ground.
Merge remote-tracking branch 'origin/master' into eric/shape-refactoring

Conflicts:
	src/GUI/GRIPFrame.cpp
Merge branch 'master' of github.com:golems/grip
Merge branch 'eric/shape-refactoring'