drop unnecessary tuple around argumentless commands.
erltrek_ship: take over phaser command from erltrek_phaser.

fix indentation..
erltrek_klingon_commander: attack!

Still a lot left todo, though..
and it feels like the klingons are a bit weak..

Anyhow, they attack, and once their energy
is running low, they flee.. yay :)
(and die if they're unlucky enough to take
 a long route out of the sector :p)