README.md in exercism-0.0.3 vs README.md in exercism-0.0.4

@@ -4,12 +4,21 @@
 
     $ gem install exercism
 
 ## Usage
 
-    $ exercism login YOUR_GITHUB_USERNAME -s YOUR_EXERCISM_SECRET
+    $ exercism login
+
+You will be asked for your GitHub username, and an exercism.io API key. The
+API key is displayed when you log in to the exercism.io website.
+
     $ exercism fetch
-    $ exercism submit -f example.rb
+
+This retrieves the README and test suite for your current assignment.
+
+    $ exercism submit example.rb
+
+This submits `example.rb` on your current assignment.
 
 ## Contributing
 
 1. Fork it
 2. Create your feature branch (`git checkout -b my-new-feature`)