Install rack livereload so we don't need browser plugins
Move resend confirmation form to simple form

And make errors way better
Make the action more prominent
If the email has already been registered suggest logging in
Automatically sign in the person when they confirm their email address

Fixes #1029

There's a security issue we're accepting here. If a person mistakenly
requests a password change to a valid but unintended email address
then the recipient could take over their account in the time between
them sending the request and noticing they'd updated their email
incorrectly.

We're accepting this risk because it seems very unlikely and your
account here isn't exactly your bank account.
Merge branch 'master' into welcome_page
After someone confirms their email address, send them to welcome page

If you're changing your email address, it's likely you're already
signed in so we check this and just redirect you normally in that
case.