Added a max_bones_per_partition parameter to ComplexShape::Split and NiTriBasedGeom::GenHardwareSkinInfo in anticipation of Tazpn adding that capability.

Added != operator to Matrix44.
Added IsSplitMeshProxy function to NiNode.

Added a SetBoneWeights function to NiTriBasedGeom which automatically calculates the correct bone center and radius.
The NiSkinData::SetBoneWeights function now requires the radius and center as arguments.

The code I added to make NiTriBasedGeom select the correct skeleton root was wrong and has been re-written and tested.  It now seems to select the same skeleton root as real NIF files.
The NiTriBasedGeomData::SetUVSetCount function now sets the hasUVs bool value correctly.
Fixed some skin related bugs in ComplexSh::Split.

Created a new ComplexShape class which can currently be used to automatically split the sort of complicated mesh that contains per-point-per-face attributes into NiTriShape classes.  Should support skinning as well, but has not been tested.
Added TexCoord == operator.
Changed type of Triangle members to unsigned short.
Color4 now defaults to all zeros.
NiAVObject::AddProperty now takes a const argument.
Fixed exception in NiTexturingProperty to throw a runtime_error instead of a string.
NiTriBasedGeom::BindSkin should now automatically finds the skeleton root by itself.  The skeleton_root argument has been removed.