TF2 Mobs

Massive improvements to Team Respawn Banner:

it's health is now displayed in a boss bar

now loses configurable amount of health on each respawn

respawn times are now configurable

multiple banners per world are now allowed

any mob that is in a TF2 team can now respawn, not just the mercenaries

Added TF2 Team Wand, a creative only item that is used for adding other mobs to TF2 teams.

Added Checkpoint blocks which can be used together with respawn banners and are creative mode only. They are used to tell the mercenaries where to go. Standard navigation between banners may not be enough on some maps or if the terrain is hard to traverse, so now you can manually point where to go.

Mobs in a TF2 team now automatically attack other entities in the opposite team.

Fixed "Activate Ubercharge" keybind crashing the game.