Add send_mail job
Send mails as background jobs
Fixes in tests
Rename get_all_jobs to get_scheduled_jobs
Update theme
Merge branch 'master' into issue-background-jobs-mail

* master: (22 commits)
  Update theme
  Remove redundant app contexts
  Removed User helper
  replace git ssh address with https. Better for non auth users
  Update docs with rq dashboard
  Fix in docs: use bash syntax
  Use UTC time.
  remove code fixed by new rq-scheduler version used
  Use forked rq-scheduler repository in PyBossa
  Lambdas don't get on well with workers
  Revert: remove warm_cache from jobs for now as it times out
  Temporary fix to create the list of queues in Redis
  Add another job to scheduled tasks
  Add RQ-dashboard blueprint to app
  Add rq-dashboard dependency
  Add tests for access privileges to rq-dashboard
  Update theme
  Use cached version of contributed apps in private profile
  Typo in urls
  Use latin1 decoding for response headers
  ...

Conflicts:
	pybossa/core.py
	test/test_web.py
Merge pull request #930 from PyBossa/issue-background-jobs-mail

Issue background jobs mail
Merge branch 'master' into issue-927-clean-old-projects

Conflicts:
	pybossa/jobs.py