update sdl functions to latest revision
add a grayscale utility to uiimage
implement a preliminary support for chatting
revert rotation changes for engine
lots of code cleanup
restored main event loop in hwengine
fix some sdl bindings
[Desktop Entry]
Type=Application
Version=1.0
Encoding=UTF-8
Name=Hedgewars
GenericName=Fighting Hedgehogs
GenericName[tr]=Worms Benzeri Strateji Oyunu
GenericName[ru]=Битвы ежей
Icon=hedgewars.png
Exec=hedgewars
Terminal=false
StartupNotify=false
Categories=Application;Game;StrategyGame;