6e43d01 webui: plugin API

Authored and Committed by pvoborni 9 years ago
    webui: plugin API
    
    new `extend` module should serve as a stable API for plugin authors.
    It should expose the most commonly used global calls.
    
    https://fedorahosted.org/freeipa/ticket/4345
    
    Reviewed-By: Endi Sukma Dewata <edewata@redhat.com>