Include a preliminary version of .mySharesRootURL().  Not yet tested, at all.
Implement model-less view that consolidates a listing of share rooms
currently being visited by the app and the list of share rooms associated
with the account (when there is a logged in account).

This is not yet working, but further along.  Further along in the right
direction is the question; this checkin will enable some review.

The current, outstanding problem is putting the visited set of share rooms
in a collection still requires that the collection have a URL - but it's
just a local collection of share rooms, the ones being visited.

Rename ShareRoomsView.js to ShareRoomsViews.js, since it's, significantly,
more than one.  Adjust grunt concat accordingly.
Instantiate the ShareRoomsConsolidatedView and push it on the view stack.

Question: do we need to provide a case for the current view being the same
as the new one?
Whoops - add comment with question about providing for case where view
isn't changing...