NOTE: BLI_winstuff.h was meant to be a wrapper around windows.h to handle
undefining various crap that windows.h defines. Platform specific headers
should only have to be included in a few places. This reduces the number
of inclusions of BLI_winstuff.h to 16 which is a much more reasonable
number (than the 144 or whatever it used to be)
It moves targa, bmp, iris and png loading so that were not opening
2 file handles for each file, and made them like the jpeg stuff.
Also cleaned up some minor other stuff.
Kent
The padding is slightly messed up, so it produces somewhat trunkcated images
however it works. I'll try and fix it later but I have to go home now.
Its atleast usable at this stage.
I moved bmp_decode.c to bmp.c and cleaned it up a little bit.
Kent
