*IMPORTANT* Updated SDL to 1.3, you need to get it for your platform if you build from source

Mouse pointer is now hardware rendered, removing cursor lag even at low FPS
Keybinds are updated to use scancodes which are layout independant, existing key bind settings will be wiped; please redo them as needed
Hotkeys are now displayed as icons on the bottom of the screen


git-svn-id: http://svn.net-core.org/repos/t-engine4@3991 51575b47-30f0-44d4-a5cc-537603b46e54