When looking for CD metadata on MusicBrainz, we were looking for a
perfect match: only one release with a score of 100. If the search
returned more than one result with a score of 100, we would reject all
results.
MusicBrainz recently started to return multiple releases much more
often, causing our metadata fetching to fail quite a lot.

We now use the first result if it has a score of 100, ignoring any other
results.

This also fixes a NRE when no results were found.

Our Audio CD metadata lookup and coverart lookup that depend on MB were
broken without this.

MB now requires a UserAgent to be set.  This change will let Banshee set
one.

David Nielsen authored Apr 30, 2011 and Bertrand Lorentz committed May 01, 2011

Signed-off-by: Bertrand Lorentz <bertrand.lorentz@gmail.com>

Michael Martin-Smucker authored Apr 26, 2011 and Bertrand Lorentz committed May 01, 2011

Some .pls playlists could not be imported into Banshee because they use
a capital 'P' in the '[Playlist]' header. This patch lets Banshee read
these playlists by ignoring the case of that header.

Signed-off-by: Bertrand Lorentz <bertrand.lorentz@gmail.com>

Underscore character was not displayed in the label for the feed URL,
because it was considered as a mnemonic.

Signed-off-by: Gabriel Burt <gabriel.burt@gmail.com>

Signed-off-by: Gabriel Burt <gabriel.burt@gmail.com>

Frank Ziegler authored Apr 07, 2011 and Bertrand Lorentz committed Apr 25, 2011

Signed-off-by: Bertrand Lorentz <bertrand.lorentz@gmail.com>

Signed-off-by: Gabriel Burt <gabriel.burt@gmail.com>

Signed-off-by: Gabriel Burt <gabriel.burt@gmail.com>

Ignore attempts to set the label to its current value.

UpdateLabel calls QueueResize, which causes an expose event anyway.

Signed-off-by: Gabriel Burt <gabriel.burt@gmail.com>