Fixed cubemaps rendering (Skyboxes)
Removed useless enum
Added Quaternion::Normalize static method
Fixed global math include
Improved SparsePtr class

Added implicit conversion from a normal pointer to a sparse pointer
Added implicit conversion to boolean
Added implicit conversion to normal pointer
Added support for const pointers
Renamed Get/Set to GetPtr/SetPtr
Updated Freetype

Added 64bits MinGW binairies
Fixed PCX loader crash