Feed: XML tags escaped for iTunes Categor Fixes #2
Don't show duration tags if empty Fixes #5
Fix undefined notice for Dicentis blog posts in dashboard
if no iTunes E-Mail don't save n.a. Closes #7

Enclose all portions of your XML that contain embedded links in a CDATA section to prevent display issues and to ensure proper link functionality in the Podcasts app. For example:
Wrap subtitle in feed in CDATA tags
Add sample cover art

a sample jpeg is used when no cover art is used by the user. As fallback
:heavy_plus_sign: Add get_cover_art method for feed

Method returns url to cover art. If no option of cover art is saved by user sample cover art by plugin is used
Add media upload for cover art to settings page
Make media upload for cover art work
Use correct option name for cover art
Merge branch 'feature/cover_art' into develop
Use CDATA for summary, description, and subtitle Fixes #8 Closes #1
Merge branch 'feature/feed_validation_warnings' into develop