title: rails script/generate skip unnecessary files by default
body: <p>Script/generate became very annoying since I started using rspec etc. I dont need unit test files and fixtures anymore, but script/generate makes them anyway.</p>
  
  <p>Is it possible to set <code>--skip-fixtures</code> and <code>--skip-test</code> to be default system-wide (or at least project-wide)?</p>