Adds attackingStars list to stars
Fixes nextPlanet function
Tidies up code
Adds key for removing last star (m)
Fixes setting of target stars
Check if planet is alive and has target before sending out ships
Remove planet from star only if it has parentStar
Fixes randStar function
Exit loop if star was found
Merge branch 'master' of github.com:Ambientmedia/FastPrototype