phaser: deplete energy on fire.
Merge branch 'kaos-galaxy-server' of git://github.com/jj1bdx/erltrek into galaxy-server

Conflicts:
	src/erltrek_ship.erl

Our two versions were practically identical now ;)

I kept my version though, as it pass the failure status back to the
command invoker, rather than emitting a separate event for it.