Add artwork field to db (upgrade to v15). Set field when embedded
artwork found by the filescanner. Reenable support for embedded
artwork in group requests.
Add misc.h include to artwork and correct safe_atoi32 call
Change embedded artwork libav preprocessor conditions
Add preprocessor macro FFMPEG_INCOMPATIBLE_API and use it, so
we use avcodec_find_best_pix_fmt_of_list for ffmpeg. Also rearrange
ffmpeg/libav libraries according to ffmpeg FAQ.
Reduce ffmpeg/libav log messages on default log level
- the messages are useless anyway, since we don't echo the name of
the file the message concerns
Try to autoselect a non-selected raop device if no valid output was
selected. This should make life easier for users of Remote on iPhone
where speakers can only be selected after playback has started (I
think...)