title: Gracenote GNSDK for ios: video lookup don't return season number
body: <p>I've setup the Gracenote SDK for iOs and successfully made some videos lookup.
  I've noticed that for series the sdk correctly return the episode number but don't return season number and for many series.</p>
  
  <p>Here are the logs (Big Bang Theory)</p>
  
  <pre><code>airing start:   2015-10-03T10:05
  airing end:     2015-10-03T10:30
  channel tui:      251537434
  channel tag:      F65C41B31CA03052BAD934B93C9ACF57
  channel name:     NRJ 12
  channel callsign: NRJ 12
  channel number:   
  program tui:      556745075
  program tag:      63D1515CDA5AD50A6579997F97598833
  program title:    The Big Bang Theory
  program subtitle: La démission de Penny
  program seasonNumber: 0
  program episode: 13
  </code></pre>
  
  <p>for:</p>
  
  <pre><code>NSLog(@"program tui:      %@", program.tui);
  NSLog(@"program tag:      %@", program.tuiTag);
  NSLog(@"program title:    %@", program.officialTitle.display);
  NSLog(@"program subtitle: %@", program.subtitle.display);
  NSLog(@"program seasonNumber: %lu", (unsigned long)program.seasonNumber);
  NSLog(@"program episode: %lu", (unsigned long)program.seasonEpisodeNumber);
  </code></pre>
  
  <p>Did I missed something ?</p>