All tables intended for including should be included

[bertfrees]

Ideally all tables that are intended to be included in other tables should actually be included. We should not expect the user to know which tables to include for which purpose and at which point it should be included (the order of including tables matters). Display tables are an exception because they have a special meaning and they are always the first table in a table list.

So ideally the user should only have to specify two tables, one display table and one translation table. The translation table will contain all the necessary metadata to be able to select it based on a list of features (see #41).