Poll claims to have ended before deadline

[mensch72]

Sometimes when accessing a poll (for the first time), it claims to have ended, although it is still running. Reloading the page several times resolves this most of the time. This is probably related to syncing problems like #159 and #161

[mensch72]

if we need the server time, maybe this helps: https://stackoverflow.com/questions/6136028/couchdb-get-server-time-with-an-http-request-in-couchapp