Fix: Player does not appear in post b/c of method change
Add support for new settings in feed.

The Feed will always get the valid value of a show, episode, or setting depending a show setting or a fallback is defined. To do that a show model and an episode model are created.
Merge branch 'feature/update_feed' into develop
Bump v0.2.2
Fix bug causing trouble with feed generation if no show options are in DB
Avoid Warning during DB Update if `dipo_general_options` or `dipo_itunes_options` are not given
Finish release v0.2.2
Merge branch 'develop'