use travis irc bot
SDL2 by sdos-test
update cmake to sdl2
Update travis to download SDL2

(special repository needed for ubuntu 12.04)
use clamp instead of minmax
cleaner getfps
getfps fix
SDL_mixers DEFAULT_FREQUENCY is shit
Update platform_windows.
vsync fix

reorder some commands as tesseract calls them
no need for deprecated sdl-bug-workarounds anymore
write vsynctear in init.cfg
merge the different screenres-functions (to fix scr_w and scr_h commands)
update init.cfg (resolution)
no need to directly include SDL_thread.h

git-svn-id: svn://svn.tuxfamily.org/svnroot/tesseract/main@139 b412e182-2ed4-4078-95c4-27dc59f57fa9
use initwindowpos hack on all platforms