Changed subtitle text to only include album if track album is non-empty.
Added xml escaping for title, subtitle and arg when creating an Item to preserve special characters like ampesand and apostrophe.
Changed from using track name to using track id as arg to avoid issues with special characters in track names.
Changed Alfred workflow settings for "play" and "maestro" keywords to enclose query in double quotes and not escape spaces or brackets. This is to accomodate special characters in the query string (e.g. ampersand).
Updated .alfredworkflow file.