Add param back for setting AI skill after spawn. Add 'ASR_AI' option for AI difficulty and make that the default.
I think this doesn't do anything ATM since it looks like ASR_AI3 runs afterwards anyways - but don't want to lose work.
Missing '99' from list of values (ASR_AI option wasn't showing up).
Fix bad default mission difficulty.
I think this fixes #5 (AI skill being stuck on 1). Well, doesn't fix so much as can be used to verify things are working correctly.
Update PBO
Update PBO & mission to V.18