Added touscha starfighter and other stuff

-Added the Touscha Peregrine and replaced its placeholder, the javelin
-Modified mission.xml so certain missions don't show up on touscha
worlds
-Modified the Touscha equip script so certain problems with the
starfighters not firing are eliminated
-Modified the Touscha spawn script so that there aren't so many capships

The engine sprite for the Peregrine is jumpy, I'll get working on that