added simple call function to tokenizer, changed protgym script to wo…

[Muedi]

…rk with said tokenizer

I also removed the whitespaces :)

[Muedi]

@jamaliki I have no idea how to ask for a reviewer and need to go, so I'll ping you here :D

[jamaliki]

Hey, this is great! Let me merge my new tokenizer branch, maybe we can add your call function to that one and then we can merge this branch? That way we won't have to go back and change this branch.

[Muedi]

closing this one as I needed to rebase anyway :)