Copy helpful comments about original source

Migrate the helpful comments about the method and initial source for the
implementation for the original sauron file.

Author: cupakromer

lib/kracken/controllers/token_authenticatable.rb

@@ -13,8 +13,10 @@ def self.included(base)
         end
       end
 
-      # NOTE: Monkey-patch until this is merged into the gem
+      # Customize the `authenticate_or_request_with_http_token` process:
+      # http://api.rubyonrails.org/classes/ActionController/HttpAuthentication/Token/ControllerMethods.html#method-i-request_http_token_authentication
       def request_http_token_authentication(realm = 'Application')
+        # Modified from https://github.com/rails/rails/blob/60d0aec7/actionpack/lib/action_controller/metal/http_authentication.rb#L490-L499
         headers["WWW-Authenticate"] = %(Token realm="#{realm.gsub(/"/, "")}")
         raise TokenUnauthorized, "Invalid Credentials"
       end