Fixed bugs and focus on new Contributor if added
Fixed bug in Contrib list
Realname will not further be used for slug generation (instead we'll use publicname)
Unique related Flattr Buttons
bump version, update readme
Merge remote-tracking branch 'podlove/contribrefine3' into release-1-9-8
update readme
support automatic closing of commenting

fixes #278
fix feed paging issue where WP misscounted the number of pages

fixes #279
fix sum of all media file sizes in dashboard statistics
$contributor->realname -> $contributor->getName()
Added alt Tag to License Picture
Fixed item limit for feeds
See Description

- Release Notes
- Hide columns if no roles or groups are set
- Fix errors on save if group or role is not set
Fix Feed not being displayed if empty contributor is set
Fix JS to skip empty contributors
Ignore empty contributors in contributor-table
Skip deleted contributors for episode-list-table
Release Notes
Remove columns instead of hiding them via css