Limit or remove REV from rotation

[Mageziya]

Here's the most bad-aid fix I can think of that's really quick to implement:

-Remove RevHead PDA's
-Give a giant blaring warning that it's a rev round at the 5 or 10 minute mark.

This won't fix a lot of the problems, but it should change Head's chances of winning from "never" to "maybe 10-20% of the time?".