More work on URLs and publish.
* Add a uuid to the profile itself. So now we have a uuid for each specific version, and a uuid that points to the profile as a whole. * On the manage page, move the URL to the left hand panel, and add a second URL. One is the URL of the specific version, and the other is a URL to the entire profile. Add popovers to explain the difference between. * On the instantiate page, when you use this URL, we instantiate the most recently published version of the profile. * Add a bit of verbiage to the publish modal.