* update Windows icons to include 64x64, 128x128, and 256x256 sizes
* add "orange_icon.ico" (unused; classic orange color of logo)
* remove unused 32x32 "build_icon.bmp" file
git-svn-id: https://svn.eduke32.com/eduke32@2382 1a8010ca-5511-0410-912e-c29ae57300e0
hendricks266