add @return to Podcast_Post_Type::add_post_class
Merge pull request #363 from podlove/fix_docblock

add @return to Podcast_Post_Type::add_post_class
Added refresh buttons for Auphonic presets
Merge pull request #364 from podlove/auphonic_refresh_button

Added refresh buttons for Auphonic presets
Merge branch 'master' into release-1.10.7
update readme
auphonic: add a space
pass more data to web player

New values:
- show object
- license object
- list of downloads

Still available but deprecated: showTitle, showSubtitle, showSummary,
showPoster
fix web player compatibility
fix contributor template filter typo
add services and donations to export format
improve export format

- new xml namespace
- wpe:export as wrapper
- publisher version and export date as comments
- indentation