Slow dark angels down a bit, but they now attack players in safe spots.

By request, dark angels have been slowed down from the highest speed to the second highest. However, they will now attack players sitting in safe spots (technically they attack through walls, which is the only way to accomplish this at the moment).

This pull will also contain some fixes to rare bugs in evil twin and reflection where the illusion is killed while it is still getting data from the original (i.e. instantly), probably by increasing their HP back to a higher level. Players have reported the speed increase on both of these monsters makes them better but not overpowered, and some have suggested raising the HP.