Add basic navbar

This commit adds a basic navigation bar; the requisite changes have also
been introduced into the Firebase.
Remove angularFire-seed chat client

This commit removes the simple chat client that is included with the
angularFire-seed project.  However, the account/login pages are left as
they form a functional authentication mechanism that is currently being
used.
Rename CommonCtrl to NavbarCtrl

This commit changes the CommonCtrl controller on the page body to a
NavbarCtrl controller which only applies to the navbar, limiting the
scope of the navbar items and allowing separate controllers for any
other header/footer content.
Make navbar show the active page

The navbar now correctly shows which section is active.
Update Angular versions

This updates the index-async.html file to use the latest versions of
AngularJS and AngularFire.
Add School Profile page and new routing mechanism

This commit adds a new routing mechanism that does not require routes to
be manually added for each page; instead, it attempts to serve all uris
given to it and redirects to home if they are not available.  As a test
of this routing mechanism, this commit also adds the beginnings of a
school profile page.