Rebalance

Signed-off-by: kat <kat@lua.cz>
Make devastator explosions twice as devastating.

Signed-off-by: kat <kat@lua.cz>
Keybindings and preserve sound settings

F7 - quicksave
F8 - quickload

and --quickload option to jump straight into quickload game

Signed-off-by: kat <kat@lua.cz>