How to: Rotate a building in-game.

Buildings CAN in fact be rotated in-game, but it requires setting them up properly ahead of time. To make a building you can rotate in-game, do the following:

1) Either create a new building or modify an existing one to have a movement type (I recommend Foot).
2) Set up a trigger that removes the ability "Move" upon construction of the building.
3) You may now order the building to face a point via triggers. It's that simple!

I'm writing this up mostly because I didn't see any good way to do this when I searched the forums to figure out how to do it. Hope this helps someone.