Merge pull request #31 from MrSmith33/master

Fix result assigned to parameters in Quaternion.fromEulerAngles.
Added Frustum implementation
Fixed #32
Improved Quaternion axis/angle conversion
Improved dlib.filesystem
Removed affine inversion
Added LU decomposition
Removed deprecated files
Fixed #34
Fixed #33
Fixed #36
Fixed #35
Fix warnings and deprecations in dmd 2.067. Fix C-style arrays.