IIRC that is the old Guvnor rest api which might get deprecated in the future releases. The new Guvnor REST api docs are here: http://docs.jboss.org/drools/release/5.3.0.Final/drools-guvnor-docs/html_single/index.html#d0e2267. I know you can use it to get a pkg file from Guvnor, however not sure if there is a command for compiling a package. Will check with the guy who wrote that stuff and get back to you.
Hope this helps.