Starting on error messages for sign in page.

issue #364

Putting the js to handle form submission into the respective ejs file until we have a good way of separating form elements and binding onto individual forms.

initial push toward the new design.  this is only for the site and does not include the popup.  serveral places are broken and marked with a XXX for fixing.

Conflicts:

	browserid/static/css/style.css

initial push toward the new design.  this is only for the site and does not include the popup.  serveral places are broken and marked with a XXX for fixing.