enable html5 component by default for bootstrap - fixes heartcombo#471

Author: isc

lib/generators/simple_form/templates/config/initializers/simple_form.rb.tt

@@ -46,6 +46,7 @@ SimpleForm.setup do |config|
   end
 <% if options.bootstrap? %>
   config.wrappers :bootstrap, :tag => 'div', :class => 'control-group', :error_class => 'error' do |b|
+    b.use :html5
     b.use :placeholder
     b.use :label
     b.wrapper :tag => 'div', :class => 'controls' do |ba|