Improve bookmarking title and header with full menu paths (#54) 

Pull request for review. This addresses issue https://github.com/mozilla/mozmill-dashboard/issues/54.

This is the work to add full menu paths to the dashboard. All changes as per code review have been made. Also:

- I believe we get the initial build free on page load, as a by-product of it loading #/functional
- if the server is ambiguous it will still do its proper "Menu - Sub Menu" thing
- I need to check the new /detail and /failures additions with tests in sandbox
- the function is called first in each report to eliminate any rendering delay, however small

Adding @whimboo for visibility.