Update README.md
Update README.md
Update README.md
Update README.md
Create Sphere.h
Create Sphere.cpp
Merge branch 'master' into geometry
Merge branch 'renderer' into geometry
Add sphere to test scene
Sphere intersection computation
Allow to skip the computation of the point of intersection
Fixed rendering of scenes containing several objects
Merge pull request #7 from merlinND/geometry

Sphere
Merge branch 'master' into renderer

Conflicts:
	src/scenes/TestScene.cpp