[qatl] response formats

[netzulo]

TODOs

EDIT: will finish this branch at issue #23

• handle member tags in response xml_str
  • 1st structure : (member > (name + value > string | int)) * **n**
  • 2nd structure : name + value > struct > (member > (name + value > string | int )) * **n**

Issues related

#21

notes

Maybe this doc note helps to fix old tests

class BaseHandler(object):
    def parse_node_value(self, node_value):
            # TODO: i don't know how to do this yet
            # different response for each request...
            # maybe ResponseMaybe class have no sense 
            # maybe must return dict always ?