title: gmaps4rails automatic geocoding not working
body: <p>I have a simple app running Rails3 &amp; the gmaps4rails gem.<br>
  I have the map displaying successfully.  </p>
  
  <p>But, when I create a new User, the lat/long is not automatically generated like in the screencast.  What am I missing?</p>
  
  <p>Here is my model code:  </p>
  
  <pre><code>class Merchant &lt; ActiveRecord::Base  
  acts_as_gmappable  
   def gmaps4rails_address  
    "#{self.address}, #{self.zip} #{self.city}, #  {self.country}"  
   end  
  end
  </code></pre>
  
  <p>I also can't enter in an address as simply "City, State".  I have to put in a complete address or I get an error.</p>