added lens texture for female medic - shared by male engineer

added invisible shader to toolgun's material list and removed duplicate copies previously used by the models since they aren't necessary anymore

added wansyo/class models - they're bonemergable shoulder insignias and the only other way to get them is through a map pack
since they're technically shared content that add onto the original models, i figured i'd toss them in here

removed mouth textures - already included in base game, and were downgraded for censorship reasons supposedly

added mouths and the invisibility texture for people to fool around with - still not intended to be included in playermodels, would suck to fight against