List all addons that can be launched

        :param args: arguments from the launch parser
        :type args: Namespace
        :param unknown: list of unknown arguments
        :type unknown: list
        :returns: None
        :rtype: None
        :raises: None

def list(self, args, unknown):
        """List all addons that can be launched

        :param args: arguments from the launch parser
        :type args: Namespace
        :param unknown: list of unknown arguments
        :type unknown: list
        :returns: None
        :rtype: None
        :raises: None
        """
        pm = mayaplugins.MayaPluginManager.get()
        plugs = pm.get_all_plugins()
        if not plugs:
            print "No standalone addons found!"
            return
        print "Addons:"
        for p in plugs:
            if isinstance(p, coreplugins.JB_StandalonePlugin):
                print "\t%s" % p.__class__.__name__