Fix error reported on https://www.drupal.org/project/simplepodcast/issues/2988118
Bug fix pointed out by https://www.drupal.org/project/simplepodcast/issues/2998792
Added patch from jlockhart
Small Type-o Fix where Podcast Title was listed as Podcast Description
Fixed some issues with categories containing ampersands and also allowed for blank categories.
Added Episode Content Type by default along with reasonable configuration defaults to reflect that.
Initial release for Drupal 8