Added support for setting up maintenance windows of under an hour.
Added support for using tokens instead of usernames and passwords.
Added 'version_added' attributes for new fields.
Also added missing fields to documentation and added some more examples.
Merge branch 'devel' of github.com:ansible/ansible into devel

Conflicts:
	library/monitoring/pagerduty
Removing unused code
Added additional error checking to avoid HTTP400 responses from ansible.
Merge pull request #6301 from gitterHQ/devel

Pagerduty improvements