Search song: Didn't get deezer's track ID

Hello,

The bucket parameter in our API is multivalued. Your code is clobbering the value of the bucket parameter on your 6th line. The actual value of the bucket parameter should be an NSArray in cases like these. There are some examples how to do this in the library tests, but I think the right way (untested!) is:

    [p setValue:[NSArray arrayWithObjects:@"tracks", @"id:deezer", nil] forKey:@"bucket"];