corrected a few LittleLongs to LittleFloat in md3 loading (EEP those were bad)

corrected a few LittleLongs to LittleFloat in md3 loading (EEP those were bad)
.skin loading is now able to parse the quake3 format, and uses "common/nodraw" or "textures/common/nodraw" for the invisible parts, this also meant supporting replacement tag names in the .skin files...  so that's implemented as well (quite difficult)
COM_ParseToken upgraded to be able to parse .skin files (now identifies more single character tokens, and can return newlines if desired - this required patching lots of code to pass false to it)
added beginnings of support for DPPROTOCOL_VERSION4 in client (I.E. does nothing right now because the server speaks DPPROTOCOL_VERSION3)

git-svn-id: svn://svn.icculus.org/twilight/trunk/darkplaces@3352 d7cf8633-e32d-0410-b094-e92efae38249