Starting on error messages for sign in page.

issue #364

Bringing in the tooltips and templates.

Adding tooltips for missing passwords, passwords too short, password mismatch.

Add error message if token is not valid.

issue #335

issue #349

Making fonts larger, bigger buttons, smaller headers and footers to get out of the way.

Other changes to go along with the more semantic markup.

Simplifying the layout of the hints and password sections a bit, making the markup more semantic and easier to follow.

Some styling changes so it is easier to select email addresses on mobile, place the site name in the white line at the top.

close #358

Putting the "this is not me" and "use a different email" on a different line from the "sign in" button.

Also cleaning up the styling of the email selection box.

close #357

When hovering over email addresses in the pick email, change the cursor to a pointer - unless there is only one address.

close #356.

Updating all controllers that use it.  Cleaning things up, making it prettier.  Good to go.

Adding email validation/verification.  Adding error messages of email or password fields are not correct.

Hiding all tooltips by default.

Automating the addition of the CSRF token to POST requests.

Testing for CSRF tokens in POST requests in the unit tests.

Fixing up the unit tests for the new context info.  Fixing the checkAuth call which was calling the callback twice.