playlist-manager: Remove the play button to save horizontal space.
Double-click works just fine to play a playlist.
xsf: Fix typo.
sdlout: Remove an unnecessary pthread_cond_wait().
qtaudio: Use new-style plugin declaration.  Some fixes.
qtaudio: Use QAudioOutput::processedUSecs().
qtaudio: Don't use QAudioOutput::processedUSecs() after all.
qtaudio: Wait until bytesFree() >= periodSize().
qtui: fix ugly statusbar object borders on windows and x11
po: German translation update.
Add album artist support.  Closes: #238.
Make TransportPlugin::fopen() a virtual method.
Combine OutputPlugin::buffer_free() and OutputPlugin::write_audio().
po: Check header files for translatable strings.
ALSA and OSS contain the PluginInfo there.
qtui: Support left mouse button in time slider.
Let output plugins track only delay, not total output time.
coreaudio: Update for get_delay(), not tested.
New sndio plugin.
alarm, albumart: Use new-style plugin declarations.
aosd: C++ conversion and cleanup.
gtkui, skins: Allow multiple entries to be queued at once.