Add metadata cache for audio players
Submitted by James "Doc" Livingston
Currently when using the generic audio player support, the tracks must be loaded every time, which is slow. It would be good to have a metadata cache to avoid this.
Writing all the db entries of the right type into a special cache file, and loading it on mount would probably work. ~/.gnome2/rhythmbox/cache/
<device UID>.xml or something similar.