Added to booleans
1. selectable	| if this is false, you cant select the unit.
2. commandable	| if this is false, you cant give the units commands.

I advise to set a non-selectable unit to non-commandable too if you want to make a normal unit morph into it.
-AI can't command non-commandable units anymore
-Removed non-selectable
Merge pull request #23 from titison/feature/unit_control

non commandable units