Consistency is Good. Right?

• trakt.user.stats:
  • Tidy up rating distribution
  • Remove to.data.frame option because the output is too messy
• Add another @family tag to docs for aggregation functions (.popular, .trending, .related)
• Individual functions don't have to warn about missing headers, that's trakt.api.call's job.
• trakt.getEpisodeData:
  • Explicitly drop episodes with NA firstaired fields
  • The episode_abs field is usually NA, so let's dump epnum on it
• Use extended = "min" as default across functions for consistency with the trakt API