pl_badwater_pro v12

First things first, big thanks goes to UGC Kumori for gathering and facilitating feedback over the Holidays!

This version of pl_badwater_pro contains a couple changes to help RED hold second, as feedback indicated it had become too weak of a hold in comparison to standard pl_badwater. The changes include the reintroduction of the one way gate from A to B rooftop that was in versions prior to v10 and the removal of the barricade in B alley.

The other major change in this update is a new staircase in Tires that leads to the spiral staircase at last point. This is an experimental change meant to provide more routes for BLU to push and flank from. Given that this is the entirely untested change in this version, special attention will be paid to feedback on how this affects RED's last defense.

Just a quick fix

With feedback collected from the UGC Highlander forums, badwater_pro is moving to a more simplified setup than before.

Changes include:
- The one way door on 1st that RED could use has been returned to its original purpose as a locked gate that will only open after 1st is capped
- 3rd has had its layout fully returned to that of stock badwater, this includes; the removal of the back room to the Engineer nest, resizing the stairwell to the nest and removing the spare catwalk outside of "House"

- The staircase to the Engineer nest on 3rd now has nobuild
- A wooden support has been added to the balcony outside of the Engineer nest to provide BLU team with a direct route

A special thanks to UGC Kumori for collecting feedback and spurring this version's creation!