Made Header and Footer functions NIFLIB_HIDDEN.
Fixed comment on NIF version 3.1
A manual change by Amorilia to the generated Header.cpp and Footer.cpp files was overwritten.  This needs to be fixed in the Python script.

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.

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

2. Add support for changing the priority on NiSequenceControllers
3. Update code due to CreateBlock changes and removal of CreateNiObject.

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.

Header and footer code now in the structs. Also small update and fix to NIF_IO HeaderString read/write.

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