Merge pull request #1341 from octokit/revert-1338-4-stable

Revert "Update README to remove Octokit client instance creation with username and password."

README.md

@@ -88,6 +88,9 @@ Access the library in Ruby:
 # Provide authentication credentials
 client = Octokit::Client.new(:access_token => 'personal_access_token')
 
+# You can still use the username/password syntax by replacing the password value with your PAT.
+# client = Octokit::Client.new(:login => 'defunkt', :password => 'personal_access_token')
+
 # Fetch the current user
 client.user
 ```