Add duration and first request time-to-first-byte
Remove '(Dec 17): This noise is a temporary fix for old first_page key.'
Add default fb field to summary['first_request']
Metrics: use 12 hours instead of 24 (note: some UI elements will use 4h in the interim)
Add 12 hour data links, remove 24 hour
Updated metrics tryout for 12h
PhantomJS: timing fixes, added times for onstatechange, and changed the waitFor test to check for readyState==complete