title: rspec and plugin generation
body: <p>I have rails project with rspec as default test framework. On attempt to generate new plugin i see following:</p>
  
  <pre><code>test1 alec$ rails g plugin o2p -g -t
        create  vendor/plugins/o2p
        create  vendor/plugins/o2p/MIT-LICENSE
        create  vendor/plugins/o2p/README
        create  vendor/plugins/o2p/Rakefile
        create  vendor/plugins/o2p/init.rb
        create  vendor/plugins/o2p/install.rb
        create  vendor/plugins/o2p/uninstall.rb
        create  vendor/plugins/o2p/lib
        create  vendor/plugins/o2p/lib/o2p.rb
        invoke  generator
        inside    vendor/plugins/o2p
        create      lib/generators
        create      lib/generators/o2p_generator.rb
        create      lib/generators/USAGE
        create      lib/generators/templates
         error  rspec [not found]
  </code></pre>
  
  <p>I've confused with line "error  rspec [not found]". What's the problem with using rspec generators in rails plugin?</p>