add attribution

Author: dhellmann

README

@@ -115,6 +115,11 @@ For more details, refer to the column I wrote for the May 2008 issue of Python M
 Updates
 =======
 
+1.12
+  - Check return value of virtualenvwrapper_verify_workon_home everywhere, thanks to 
+    Jeff Forcier for pointing out the errors.
+  - Fix instructions at top of README, pointed out by Matthew Scott.
+
 1.11
   - Optimize virtualenvwrapper_show_workon_options.
   - Add global postactivate hook.