* Return the Doom 2 Cast Call to vanilla and simply label Doomguy as Doomguy
* Ensure there are TWO canvas textures available for the Plasma Blaster screen
* Fix some typos in material shader definitions for Demo-chan's face (oops)
and increase width of small variant of chat box (it was shortened too much).
Also, cap hud margin to 10px instead of 20px, and set the default to 5px.
20px was honestly too much.
