app/views/devise/sessions/new.html.haml
%h2#header Sign in
.user-form
= simple_form_for(resource, :as => resource_name, :url => session_path(resource_name)) do |f|
.form-inputs
= f.input :email, :required => false, :autofocus => true
= f.input :password, :required => false
.form-actions
= f.button :submit, "Sign in"
= render "devise/shared/links"