upon clicking 'this is not me', clear all text entry fields (catches the case where a user logs in and clicks said link all in the same session), issue #27

reduce the dialog size (and hence its perceived *weight*), and increase the size of some important phrases

fix test harness.  you really must jump through hoops to create a proper substition output filter in connnect.

don't reference external resources from browserid.org to not piss off SSL, and also a small pile of fixes to the testing harness -- specifically its handling of binary data, etc.

update testing harness to be compatible with new browserid run code.  host substitution is done at a much lower level to leverage more of the connect framework