Other changes:
- Changed FlattrStatusFetcher into Thread-subclass
- Changed auto-flattr mechanism so that it's compatible with the updated PlaybackService
- Changed a couple of strings
Conflicts:
src/de/danoeh/antennapod/storage/DBReader.java
src/de/danoeh/antennapod/storage/DBWriter.java
src/de/danoeh/antennapod/util/menuhandler/FeedItemMenuHandler.java
src/instrumentationTest/de/test/antennapod/storage/DBReaderTest.java