Adding NifUtils

This is the addition of combined nifconverter/nifutils. Note that I use vs2012, so you may want to be cautious pulling the sln files if you don't use that version. I had to do some sort of upgrade process when I pulled originally.

I had to remove debug print outs in niflib by remvoign the #DEBUG. They actually modify internal fields in Header and Footer. This might just be masking errors in the nif however.