Corrected video mode setting (OSX).
Corrected wsw_server link dependencies (OSX). Renamed steam.dylib to steam_mac.dylib.
Rename R_ClearFirstFrame to R_FillStartupBackgroundColor
Remove accidentally added character
Add alloca
Merge pull request #97 from vkni/master

Video mode setting and server link deps corrections.
Allocate temporary imagelib stuff on stack