Adds new costumes fixes pixelation and adds door

Adds the following costumes:

Debate team and cheerleader for Annie
Cheerleader for Britta
Pumpkin and Evil Troy for Troy

Fixes up some stray pixels on the Gay NPC (I honestly don't know what those other characters are in the file: they were there when I opened it and I didn't want to mess something up by removing them)

And finally, a door in Black Caverns that leads back to Gay Island.

Ignore the deletion on the Abed file. I was testing out a WIP costume.