Versions formatting

Added the ability to choose the level of formatting we want.

Repro: make serve Test url: http://localhost:8000/versions/?law_name=%D7%97%D7%95%D7%A7+%D7%97%D7%95%D7%A4%D7%A9+%D7%94%D7%9E%D7%99%D7%93%D7%A2&version_a=722173&version_b=868277&formatting=basic