WIP: trying to make smart pointers work again with SWIG; for the moment I commented out most of the SWIG interface to reduce wrapper size and compilation time while testing

Replaced _WRITE, _READ, _STRING, AND _FIXLINKS defines with the corresponding internal function call.
Replaced STANDARD_INTERNAL_FUNCTIONS with the internal function signatures.
Made my Doxygen config file use relative paths and added it to SVN so everyone can generate the same documentation for themselves.
Removed includes WZ added to ComplexShape.  These were not missing, they are up to the user to include if they wish.

Renamed CreateBlock to CreateObject and made it clear that it is not necessary for the user to call this function unless s/he is working through Python.
Removed BlocksInMemory function.  Call NiObject::NumObjectsInMemory instead.
Removed CreateBlock template since new keyword can be used.
Implemented GetScale and SetScale functions of bhkNiTriStripsShape to fix linker errors when compiling Python wrapper.

Split some things that were previously part of NIF_IO.h into their own files to make SWIG wrapping work better.

Tried to implement MergeNifTrees for KF files with a NiControllerSequence root.  Untested.

Had to revert changes to Ref.h.  They changed some Python syntax and would not compile.

Implemented a missing Matrix44 function.
Updated ByteArray files to current generated versions.

SWIG wrapper improvement (but still far from complete): the generator looks into the XML to see what vector templates must be created.

Added istemplate="1" tag to the template types in the XML (only required for the basic ones, but added to the others as well for consistency).
Updated generated SWIG interface file.

Shon's XML update is now also reflected in /gen/obj_defines.h.

Removed split-tree functions from public interface.
Restored WriteFileGroup.

Renamed TextureSource to TexSource and Texture to TexDesc.

Synced supported blocks to the DocSys, adopting the new position of the AParticleModifier block.