Added several NifStream functions and << operators to the built-in types.
The new xml_extract.cpp file now compiles.
Problem areas that must be fixed in the generation script were marked with !!BUG!!

Changed projects to use Multi-Threaded DLL code generation rather than Single-Threaded.  This should be more compatible with MSVC++ Express Edition.

Moved some temporary defines to NIF_IO.h.

Added optional version parameters to all NifStream functions.  Couldn't figure out why it conflicted with Amorilia's later change so I used my code.
 

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

Added SplitKfTree and SplitNifTree functions to the interface. SplitNifTree is implemented for Morrowind only (copied code from old WriteNifTree function), SplitKfTree is not implemented at all. These two functions replace WriteFileGroup.

Updated MergeNifTrees to handle some cross references (skin blocks).  Other blocks with cross references can be added by overloading the ABlock::ReassignCrossRefs function.

MergeActions: read NIF file and all KF files (TODO: merge them as well).

Added documentation to IControllerSequence.

I made some little update to the script to make sure the libs are built in the proper order, and I also commented out the niflyze build string since it resides in another folder

Fixed ReadString function so that it can read strings with \0 characters in them.

* Support for all ten NiStringPalette offsets.
* There's still a problem with NiStringPalette: apparently the C++ string type does not allow null characters? ... Maybe we can try to find a workaround in the string reader function.

* Changed the radius algorithm.

Now the calculated center & radius values should correspond to the values found in official NIF files.