Have homepage link to sign-up
Move button inside of form.

Previously, the button was not wrapped by the <form> element, and
because of this it wouldn't submit the form.
make after_sign_in_path_for override global
setup cancel buttons
Merge pull request #52 from CG-CamSys/149-support-login-on-kiosk

149 support login on kiosk
Merge branch 'cgdevelop' into 110-default-map-to-current-location