[Merge] lp:~sergiusens/account-polld/gmail_plugin into lp:account-polld

[James Henstridge]

Review: Approve

Looks like a good starting point until we work out how to parse the history feed properly.

As discussed on IRC we should only request the headers from the message payload, but other than that it looks fine.
-- 
https://code.launchpad.net/~sergiusens/account-polld/gmail_plugin/+merge/227314
Your team Ubuntu Phablet Team is subscribed to branch lp:account-polld.