improve documentation of changes to window opening to deal with firefox bugs and code loading race conditions

use onready instead of polling to fix race condition related to window vs relay frame readiness, and fix problems in FFX with re-attaching iframes of the same name, by creating relay frames with unique names every time.

issue #287 & issue #286

Every time we create a relay frame, give it a new name.

issue #287.

channel.js - check to see if the relay frame and the necessary functions are ready before t

include.js - open the iframe before the window.

updated tests to contain proper keys and certs, and tweaked BrowserIDIdentities to undo the confusion between IssuedIdentities and StoredIdentities. Now, cleanupIdentities removes emails without certs or with expired certs, while getStoredIdentities like before just returns the list of stored identities without further checking. syncIdentities will call cleanup before anything else.

Conflicts:
	browserid/static/dialog/resources/browserid-identities.js

In dialog_controller, using this call instead of the manual calls to BrowserIDNetwork.logout and BrowserIDStorage.clearEmails

Adding cancelUser to browserid-identities and removing the work to sync emails from BrowserIDNetwork.

Also updated the globals declarations at the top of all the files to only declare the ones actually used for that file.

Since the relay is only two files, right now in compress.sh concatinating just those two files.

issue #265