title: rake routes fails because of "missing action"
body: <p>I started a clean rails app, installed and migrated the devise gem as well as a couple straightforward models of my own.  The devise user controller methods are not working (I get an error page when I go to localhost:3000/users/new but not when I got to /users/sign_up).  When I run rake --trace routes, I get the following output:</p>
  
  <p>(in /Users/tim/Coding/rails_projects/libertyhive)<br />
  ** Invoke routes (first_time)<br />
  ** Invoke environment (first_time)<br />
  ** Execute environment<br />
  rake aborted!<br />
  missing :action<br />
  /Users/tim/.rvm/gems/ruby-1.9.2-p136@rails3tutorial/gems/actionpack-3.0.4/lib/action_dispatch/routing/mapper.rb:167:in `default_controller_and_action'</p>
  
  <p>/Users/tim/.rvm/gems/ruby-1.9.2-p136@rails3tutorial/gems/actionpack-3.0.4/lib/action_dispatch/routing/mapper.rb:68:in `normalize_options!'</p>
  
  <p>and it continues with many more lines of /Users/tim/.rvm/gem/ruby-1.9.2-p136@rails3tutorial/gems/...</p>
  
  <p>I have no idea how to debug this.  I'm pretty new to rails.  Did the Rails 3 Tutorial by Michael Hartl, which helped me through most of the general setup and configuration of rails.</p>
  
  <p>Any idea what the problem is?</p>