The "People… and also other stuff"-Update

• Rename trakt.getSeasons -> trakt.seasons.summary for consistency with the trakt API.
• Rename trakt.show.season -> trakt.seasons.season for consistency with the trakt API.
• Rename getNameFromUrl -> parse_trakt_url to be more descriptive. Also, de-camelCasezation.
• Update vignette to reflect the above changes
• Add some people functions:
  • trakt.people.summary
  • trakt.people.movies
  • trakt.people.shows
• Unify output of trakt.show.people and trakt.movie.people
• Add extended argument to trakt.movies.related and trakt.shows.related (defaults to min)
• Add page param to paginated functions:
  • trakt.shows.popular
  • trakt.shows.trending
  • trakt.movies.popular
  • trakt.movies.trending
• The usual bug fixes