SAK-23634 - Add User Auditing Log that tracks when users were added/removed/updated from a site

- Adding the rest of the content and adding the new directory to .externals


git-svn-id: https://source.sakaiproject.org/svn/sakai/trunk@131985 66ffb92e-73f9-0310-93c1-f5514f145a0a
SAK-23634 - .externals property


git-svn-id: https://source.sakaiproject.org/svn/sakai/trunk@131986 66ffb92e-73f9-0310-93c1-f5514f145a0a