SDL2 Everywhere, from me and Flaming_Sword. Outstanding issues: FRED integration, project file updates, cleanup.
git-svn-id: svn://svn.icculus.org/fs2open/branches/antipodes@10062 387891d4-d844-0410-90c0-e4c51a9137d3
mask_data in the UI code is always cast to ubyte so why it was a ushort type I'll never know
fix unsized text in input boxes (fixed the real problem earlier but forgot to remove this old fix)
- I think everything should default to resize now (much easier than having to figure that crap out)
- new mouse_get_pos_unscaled() function to return 1024x768/640x480 relative values so we don't have to do it later
- lots of little cleanups which fix several strange offset/size problems
- fix gr_resize/unsize_screen_pos() so that it won't wrap on int (took too long to track this down)
The_E