Updated user's guide.

More documentation improvements.  Added documentation to NiDynamicEffect-derived objects, removed some obsolete examples, and replaced remaining references to "block" with "object" wherever possible.

Realized that Niflib was not compiling in DLL mode, so started working on fixing that.  All NiObject classes need to have NIFLIB_API and NIFLIB_HIDDEN put on each public function, rather than marking the whole class.  Still a lot left to change, but niflib.cpp and ComplexShape.cpp both compile without errors in DLL mode now.

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

Commented out functions written by Amorilia that I need to figure out how to fix.

Major update to python generation scripts and others.  Currently just namepace and mutable size members with appropriate generated code.

Regenerated all the code in the gen/ folder (no more publics in NiLight, optimized "Ref.h" include).

Made DLL creation optional and added a "Release - DLL" configuration.  The Release configuration creates a static library.

Made all include paths relative so you don't have to set any directories to compile.  Hopefully Amorilia will fix this in the code generation script.
Implemented a few more functions.

Moved all generated files to gen sub directory.
Renamed some generated files.