AI Commander to recapture FARPs.

[Acidic]

The AI commander can retake airbases, but he currently does not attempt to recapture FARPs. We should add this functionality:

• Create an ordered list of the FARPs that the commander should iterate through. The list would be ordered such that the closest to his "home base" is first, and the furthest is last.
• If a FARP is found that is not owned by the commander, he should attempt to clear any defenses.
• If a FARP is found that is both not owned by the commander and defenseless, the commander should sent in a capture force.
• Upon landing, the capture force would spawn the original (or close to original) security group, taking the warehouse/FARP for the red commander.