Deverbositation of the client interface.

[jarovo]

Currently python-fakturoid-v3 is based on following patterns:

fa = Fakturoid(...)
new_instance = fa_instance.collection.verb(Noun(attribute_name1=value, ...)))

This is cumbersome because the collections needs to be tightly bound to the nouns they are creating. It may be better to just have following pattern:

fa = Fakturoid(...)
new_instance = Noun(attribute_name1=value).verb(fa)

or perhaps we can have the noun bound to the Fakturoid instance

fa=Fakturoid(...)
new_instance = fa.Noun(attribute_name1=value).verb()
new_instance.attirbute_name1="new_value"
new_instance.verb2()

update, listing, searching, filtering could be done this way:

Noun(id=2045).load() -> self
Noun(name="foo").index() -> Iterator[Noun]
Noun(attr="foo").search() -> Iterator[Noun]

as verb is bound to the class of Noun in the time of de-referencing, there is no question about which collection is to be used for which Noun. Each noun would have the collection set in the creation time as an instance attribute.