document that hints are disabled by default

README.md

@@ -53,6 +53,8 @@ To generate wrappers that are compatible with [Zurb Foundation 3](http://foundat
 
 `rails generate simple_form:install --foundation`
 
+Please note that the Foundation wrapper does not support the `:hint` option by default. In order to enable hints, please uncomment the appropriate line in `config/initializers/simple_form_foundation.rb`. You will need to provide your own CSS styles for hints.
+
 Please see the [instructions on how to install Foundation in a Rails app](http://foundation.zurb.com/docs/rails.php).
 
 ## Usage

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

@@ -9,6 +9,10 @@ SimpleForm.setup do |config|
     b.optional :readonly
     b.use :label_input
     b.use :error, :wrap_with => { :tag => :small }
+
+    # Uncomment the following line to enable hints. The line is commented out by default since Foundation
+    # does't provide styles for hints. You will need to provide your own CSS styles for hints.
+    # b.use :hint,  :wrap_with => { :tag => :span, :class => :hint }
   end
 
   # CSS class to add for error notification helper.