Added compatibility config for Proficiency Class Pack.

Potential fix for the following bug:

A Ranger with Phantom is concealed at the start of the player turn, with the IRI_ReactiveConcealment_Entered_Value unit value set.
It attacks an ADVENT Trooper, revealing it.
Reactive Concealment doesn't fire because it's the player's turn.

On the alien turn, the ADVENT Trooper moves and flanks the non-concealed Ranger.
The Ranger is now flanked on the alien turn and has the unit value set, so Reactive Concealment activates.

At the start of the next player turn, IRI_ReactiveConcealment_Cleanup runs and removes the unit value.

Fixed the bug when activating Scamper would almost always cost an action point on the next turn, even if you did not actually spend your scamper action point.

Initial release.