I had been returning success / failed boolean values for various
operations. I think it's better to throw an exception in these
"exceptional" circumstances since error values can give more information
about why a function failed.
Signed-off-by: Anna Schumaker <schumaker.anna@gmail.com>
This patch writes out various modifications the GUI will require the
back-end library to make. This includes:
- Rename playlists to playqueues and groups to playlists.
- Make library information accessable.
- Use try/catch style errors instead of returning bool in a few places.
- Extra playqueue accessablity functions.
Signed-off-by: Anna Schumaker <schumaker.anna@gmail.com>