Multi Stage sequia (stage 2) a3

plenty of changes to C:
Removed red's access to a room
added new rooms for teams to dispute
removed the dropdown, many players were using it before the intended time.

some changes to A:
-shortened the bridge into a platform for red
-added a new platform for blu to flank through

-some other stuff too, i guess.

-added a forward spawn for blu once A is capped, pretty risky, may be good, may be awful, we'll see.

-removed some flanks to B

-added a way for red to retreat to spawn.

-some other stuff, i dont know.