keep the hand above the terrain #77
add height offset between Hand and Terrain #77

- let the hand fetch the height information from the terrain directly
- make transform/height calculations lazy
include <string> in hand.h. #77
allow toggling vsync with Key V #82
implement early bailing + general shadowing improvements #82
fix sampler uniform type #82
fetch physx data only when needed #82
fetch height at hand position when scene fbo is bound while rendering #82
fix TerrainTile bind/unbind #82
fix major performance problem: call TerrainTile::initialize() only once #82

do not load the rock.raw in every frame..
Merge pull request #81 from lanice/Fix_HandPosition_77

Fix hand position 77
remove fma for glsl 330 compatibility #82
Merge remote-tracking branch 'origin/master' into rendering_performance_82

Conflicts:
	src/hand.cpp
Update README.md #66 #69
Merge pull request #83 from lanice/rendering_performance_82

Rendering performance 82
vsync enabled per default
Merge branch 'master' into water_rendering_30

Conflicts:
	src/rendering/renderer.h