use ReallyUserFriendlyTypes vocab for type selection

collective.vaporisation.types doesn't display metaTypesNotToList - a list of types which should not displayed in navigation menus. in my point of view, i often want to build taglists from types, which are exactly not in the navigation menu - like events. there is a vocabulary, which fits better my usecase - and probably yours too? it's plone.app.vocabularies.ReallyUserFriendlyTypes

besides of that, some pep8 cleanups were done.