We will drop the assumption that wordlists are generally organized
by language. There are, for instance, many different language
lists available in english for many different purposes.

Therefore we will support different names for different wordlists,
but the names do not neccessary depend on a language (only).

Make sure it is shown only if neccessary (and not shown otherwise).

Fix real dice input range validation

The new real dice random source now works on a very plain level.

Includes an InputMock to fake keyboard input. With `InputMock` we
can fake std lib `input()`/`raw_input()` using py.tests
'monkeypatch' fixture.