build same-frame-setup layer but do not load it if no accounts.
switch to cookie
allow app upgrade to restore to email account if no cookie first detected.
Move account cookie setting to mailuniverse, to keep the db layer ignorant of such hacks.
Moving cookie work to something that may exist outside, or closer to the edge with UI
indicate if mailAPI is the fake one
Merge pull request #129 from jrburke/noaccount

Bug 843768  [email] display something as soon as possible at startup. r=asuth