old_contents: from comics.aggregator.crawler import CrawlerBase, CrawlerImage
  from comics.core.comic_data import ComicDataBase
  
  class ComicData(ComicDataBase):
      name = 'Kellermannen'
      language = 'no'
      url = 'http://www.dagbladet.no/tegneserie/kellermannen/'
      rights = 'Martin Kellerman'
  
  class Crawler(CrawlerBase):
      history_capable_days = 30
      schedule = 'Mo,We,Fr'
      time_zone = 1
  
      def crawl(self, pub_date):
          url = ('http://www.dagbladet.no/tegneserie/' +
              'kellermannenarkiv/serve.php?' + self.date_to_epoch(pub_date))
          return CrawlerImage(url)
  
new_contents: from comics.aggregator.crawler import CrawlerBase, CrawlerImage
  from comics.core.comic_data import ComicDataBase
  
  class ComicData(ComicDataBase):
      name = 'Kellermannen'
      language = 'no'
      url = 'http://www.dagbladet.no/tegneserie/kellermannen/'
      rights = 'Martin Kellerman'
  
  class Crawler(CrawlerBase):
      history_capable_days = 30
      schedule = 'Mo,We,Fr'
      time_zone = 1
  
      def crawl(self, pub_date):
          url = ('http://www.dagbladet.no/tegneserie/' +
              'kellermannenarkiv/serve.php?%d' % self.date_to_epoch(pub_date))
          return CrawlerImage(url)
  
subject: Fix concatenation bug