title: Override model's attribute accessor in a mixin/module
body: <p>I have a model which includes a module. I'd like to override the model's accessor methods within the module.</p>
  
  <p>For example:</p>
  
  <pre><code>class Blah &lt; ActiveRecord::Base
    include GnarlyFeatures
    # database field: name
  end
  
  module GnarlyFeatures
    def name=(value)
      write_attribute :name, "Your New Name"
    end
  end
  </code></pre>
  
  <p>This obviously doesn't work. Any ideas for accomplishing this?</p>