Add Unicon Office365 / Azure provisioner to projects and enhancements

Ref: https://github.com/Unicon/office365-and-azure-ad-grouper-provisioner

Unicon License is Apache 2.0, so compatible with Grouper's.

The reference source code is quite limited, making assumptions about the subject ids, deprovisioning the group upon removing the marker attribute, etc.

For possible enhancements, see:

1) UNC Chapel Hill course group project notes, which added a number of enhancements

2) Kansas State added a different set of enhancements and fixes. Source is available on Github.