Singly/hallway — pull request #793 by kristjan (2013-02-04 20:00:40+00:00)
Title: Fix Zeo timestamps and IDs

@beaugunderson, quick review? Getting these in for Sleepio, who's blocked by the
bad timestamps.

7a8bd9c (Kristján Pétursson, 2 minutes ago)
Fix record IDs

There's no native ID, so we generate one from the sleep record's bedtime.
But, we were generating it from `Object.keys(bedTime)`, which is
arbitrarily ordered, so for the same record, we could generate `6!`
different IDs. Now we're consistent.

c51c354 (Kristján Pétursson, 46 minutes ago)
Use sleep records' timestamp for `at`

The default `at` is the time we performed the sync, which isn't helpful.
Now we use the date Zeo reports on each sleep record.