Disable cookie popup if in an iframe in PR#47

[ddfridley]

In PR#47

In a repo like undebate that uses the civil-server, undebates can be embedded in iframes on other sites, like ballotpedia.org.

In the case where enciv-coolies is running within an iframe on another site, we should not popup the cookie consent request, And for now not apply any cookies.

I think that if window.parent===window the code is not in an iframe,