new_contents: from comics.crawler.utils.lxmlparser import LxmlParser
  from comics.crawler.base import BaseComicCrawler
  from comics.crawler.meta import BaseComicMeta
  
  class ComicMeta(BaseComicMeta):
      name = 'Zits'
      language = 'en'
      url = 'http://www.arcamax.com/zits'
      start_date = '1997-07-01'
      history_capable_days = 14
      schedule = 'Mo,Tu,We,Tu,Fr,Sa,Su'
      time_zone = -5
      rights = 'Jerry Scott and Jim Borgman'
  
  class ComicCrawler(BaseComicCrawler):
      def _get_url(self):
          self.parse_feed('http://www.arcamax.com/zits/channelfeed')
  
          for entry in self.feed.entries:
              if entry.title.endswith(self.pub_date.strftime('%-1m/%-1d/%Y')):
                  self.web_url = entry.link
                  break
  
          if not self.web_url:
              return
  
          page = LxmlParser(self.web_url)
          self.url = page.src('p.m0 img')
  
subject: Add zits crawler