Speed up candidate triangle searching. Maintain a flag which shows if the box contains any child triangles or not.
Add new ray-sphere intersection algorithm. The old one did not care about ray's direction.
Handle front/back triangle facing.
Replace division with multiplication.
Add transparency attribute to material (nobody use it yet).
Rename Reflect function to GetReflectedDirection.
Speed up Ray-Mesh intersections

By sorting octree nodes.
Merge branch 'master' of https://github.com/kovacsv/RayTracer

Conflicts:
	source/raytracer/intersection.cpp
	source/raytracer/intersection.hpp
Revert vcxproj files after merge