Aprons

[0.5] Added support for arbitrary materials, team names, and armor types on the signs.

[0.4] First public release. It should function fully as far as my testing locally goes, but it has not yet been tested on a live server.

Doesn't update until either death or the player selects a different item in their inventory. I'm not sure why, but item bar selection changes are frequent enough that it shouldn't matter.