save failed tasks to redis
amend
fix typo
manager interface for failed tasks
bump version
add failed_tasks template
show link to sentry
save exception type
show args and kwargs of current task on workers page
requeue button
fix button name
requeue
refactor manager
lazy import redis
refactor manager
requeue count
update tests
Merge branch 'redis'

* redis:
  update tests
  requeue count
  refactor manager
  lazy import redis
  refactor manager
  requeue
  fix button name
  requeue button
  show args and kwargs of current task on workers page
  save exception type
  show link to sentry
  add failed_tasks template
  bump version
  manager interface for failed tasks
  fix typo
  amend
  save failed tasks to redis