Search is now a little more discerning.

Until the v1.0 Mopidy Core changes arrive, jukePi will now only search
using providers specified in the config.searchUris array (defaulting to
spotify)

In addition, jukePi retrieves the available URI schemes at launch and
will identify searches that include a matching URI. If found, it will
perform a lookup instead of a search.

Once the new core features arrive, I'll allow you to specify which
backend library provider you wish to use.
Merge pull request #14 from connrs/feature-search-uris

Search is now a little more discerning.