Light Cyborgs

This adds Light Cyborgs to the game. Light Cyborgs cost about half to make and are made in the mech fabricator (i made changed to the robot fabricator but haven't tested them yet and the values would need to be changed also) they have 100 less health and their own set of icons (they currently have copies of the old cyborg icons with new names but this can be easily changed). They are built in the same way that current cyborgs are and use the same part icons (for simplicity though they do have different names and can't mix with the other types parts).