Update test scene
Refactor scene info output
Base for adaptative oversampling
Avoid recasting one ray too many when oversampling
Bi-directional adaptative oversampling (much better)
No need to recast the center ray when oversampling
Add Parallelepipoid (+ refactor Cube)

A Cube is a particular case of parallelepipoid
Add parallelepipoids to test scene
Merge pull request #17 from merlinND/performance

Bi-directional adaptative oversampling
Merge branch 'master' into geometry

Conflicts:
	src/main.cpp
Merge pull request #20 from merlinND/geometry

Parallelepipoids (geometric object)
Merge branch 'master' into lighting

Conflicts:
	src/main.cpp