Alphabetical commit
Improved MemoryPool class

It's size is now dynamic (defaulted to 1024)
Added MemoryPool::GetFreeBlocks()
Added MemoryPool::GetSize()
Tried to make it thread-safe
It supports dynamics allocations (in case where it can't allocate memory
from the pool for some reasons)
Fixed some of the pull request code in order to merge it
Added Gawaboumga to the "Thanks to" list
Updated OpenGL headers
Commited missing file (from 7dfb82)
Little corrections

HashDigest: Simultaneous use of int and short
EulerAngles: Use of the macro
Geom: cone was missing
Merge remote-tracking branch 'upstream/master'
Add of some mathematical functions

Plane: Getters and classic planes
Sphere: Getter
Vector2: Angle between two vectors
Vector3: Same in 3D
New class ray

Class ray who represents a ray in space and who can be used as a line.
Support of classical intersections.
Little fail

Plane: Forgot <T>
Merge remote-tracking branch 'upstream/master'
Little fail again

Wrong getter
Add of source

Add of the source
UTF8
Obb intersect ray

New method
Suppressions of getters
Added Matrix4::Concatenate static method
Fixed code
Merge pull request #27 from Gawaboumga/master

Merging Gawaboumga pull request (#27), fixes are coming