persistant expanded notification with play/pause/stop buttons
add settings options for  persistent and expanded notifications
disable expanded notification option when unsupported & provide informative toast
Use feed image if media file has no image

closes #484
Removed transition animation in audioplayer

Caused a white box to appear in the bottom area of the screen (#484)
Call fit() instead of resize()
Added equals implementation to FeedComponent

fixes #488

Items of removed feed weren't properly removed from queue
Fixed NullPointerException in MediaPlayerActivity
Use isNotEmpty instead of isNoneEmpty

Caused NoSuchMethodError on at least one device
Fixed NullpointerException in GpodnetAuthenticationActivity
Fixed NullpointerException in TagListFragment
Fixed NullpointerException in PicassoProvider
convert html to markdown, add fdroid & bitcoin logos
add bountysource link
Release WakeLock when it isn't needed

Release WakeLock in Presto's MediaPlayer when it is not needed. That way, it is going to behave just like Android's MediaPlayer.
Merge pull request #501 from mchelen/patch-1

convert html to markdown, add fdroid & bitcoin logo, add bountysource link
Added support for reading MP4 chapters
Merge branch 'issue-497' into develop
Upgraded dependencies
Prepared release of version 0.9.9.4