Miscellaneous updates: add series, add search_areas, update get_releases_by_discid

Signed-off-by: Ian McEwen <ianmcorvidae@ianmcorvidae.net>
Update CHANGES.

Signed-off-by: Ian McEwen <ianmcorvidae@ianmcorvidae.net>
Update mbxml for series.

Signed-off-by: Ian McEwen <ianmcorvidae@ianmcorvidae.net>
Sort series search fields.

Signed-off-by: Ian McEwen <ianmcorvidae@ianmcorvidae.net>
Merge remote-tracking branch 'ian/misc-updates'

Signed-off-by: Wieland Hoffmann <themineo@gmail.com>

Conflicts:
	CHANGES
Add pull request ids to CHANGES

Signed-off-by: Wieland Hoffmann <themineo@gmail.com>