Show user text of XMLHTTPRequest failures
Auto-join chatroom using on get-based URL
Revert inadvertent change of application ID
Fix pull request feedback
Merge pull request #2 from ErikCorryGoogle/autologin

Username query parameter & XHR debugging

1) Show text of XMLHTTPRequest failures.
2) Make it possible to fill in username with a URL that ends in /chat?user=username
Use location.hostname instead of hardcoding johnme-gcm.appspot.com
Auto-register using username query parameter.
Workaround for Push reg failing on fresh SW