Used container obj channel long_slug on get absolute url
Remove query on used annotate in get all channel
Merge branch 'master' of github.com:opps/opps-multimedias

* 'master' of github.com:opps/opps-multimedias:
  adding logger in upload task
  Fix Video and Audio list views
fix task log
Merge branch 'master' into new_urls
adding .html to video and audio detail