Added Visual Studio 2010 build files (libtommath/libtomcrypt appear to work, no guarantees about StepMania-net2010 just yet.)
Re-add headers that Windows complains about not having for one reason or another
Pull in libtommath/libtomcrypt with preprocessing pragmas for now
Fix a few Windows compilation errors (VS2k10 fixups in arch_setup, typo in Crash)
Add shell script to pull versioning info from Git on Windows and generate a "verinfo" header, then pull it into ProductInfo. This will cause Windows builds to fail until a call to this script is added.