Yes, the sample install scripts are out of date since we changed the module path. Thanks for bringing that to my attention.
You have a couple of options. You can change the value of the web.xml context param to myfaces-2.1.10 or you can change the default impl in the jsf subsystem. Since you've apparently removed the defaault "main" impl and you've only got myfaces installed, you should change the default impl anyway.
Then you don't need to declare
org.jboss.jbossfaces.JSF_CONFIG_NAME in your web.xml.