Fix Flame Tank flames (muzzle).

This wasn't fixable through offsets alone, I had to fix the flame shps. I accidentally used clock-wise ordering when renaming the flame anim frames, hence the "negative" facing.
Add muzzle flashes to all cannons and the Advanced Guard Tower (which had a muzzle in the original CnC, too).
Fix CnC mod LocalOffsets.
counter-clock flame.
disable AGT muzzle.
Merge pull request #3643 from reaperrr/cncmuzzles

CnC mod muzzles and offsets