niflib:  Update to latest xml.  Add helper properties.  Allow skinning routines to use BSDismemberSkinInstance instead of NiSkinInstance.

niflib: Update to match nif.xml.  Replace Float4 with Vector4.  Use Vector4 in bhk objects.  Introduce default values for array types.

syncing niflib with xml (note: Union field missing from BoundingVolume; see niflib hack in docsys/nifxml.py)

Separated reference counting features of NiObject into new RefObject class.  This way they won't be buried in the obj folder.
Started adding NormalizeKeys functions to data objects, interpolators, and controllers that deal with keys.  Not yet finished.

Finished new MatTexCollection helper class which makes it possible to manipulate material properties and texture objects with the same classes regardless of the intended NIF version.
Realized that only read was implemented for files with version < 3.3.0.13, so implemented write for those old versions as well.

Since there seemed to be no way to make pre-main initialization work for statically linking the library, I went back to using a CPP file that includes all the NiObject files and registers each one with the ObjectRegistry.

Updated to the latest XML, which adds support for NiBinaryVoxelExtraData, NiBinaryVoxelData, NiPSysCollider, NiBone, NiPSysSphericalCollider, and NiTriShapeSkinController.
Removed erroneous bhkMeshShape object.
Added support in the version parsing functions for versions such as "3.03" which were being parsed as "3.3.0.0" before.  These will now be parsed as "3.0.3.0."
All Bridge Commander demo NIF files other than those that contain voxel 3D textures can now be read.
All DAoC demo NIF files except those of version 2.3 and those that do not appear to store NIF data can now be read.

Added missing NvTriStripper files back into solution.

2. Convert bspline controller offsets from ushort to uint
3. fix bug in nicontrollersequence with string palette

1. Add BSBound unknown values.
2. Update MotionSystem enum
3. Add LOD Bone Controller handler
4. Fix website references