httplib2 replaces from http import send_request in Python3

[sirvon]

Traceback (most recent call last):
  File "tutumStatus.py", line 1, in <module>
    import tutum
  File "/usr/local/lib/python3.4/site-packages/tutum/__init__.py", line 24, in <module>
    from tutum.api.stack import Stack
  File "/usr/local/lib/python3.4/site-packages/tutum/api/stack.py", line 3, in <module>
    from http import send_request

FIX:

import httplib2
http = httplib2.Http()
.....
    def export(self):
        """Export the stack in Tutum.

        :returns: bool -- whether or not the operation succeeded
        :raises: TutumApiError
        """
        if not self._detail_uri:
            raise TutumApiError("You must save the object before performing this operation")
        url = "/".join([self._detail_uri, "export"])
        return http.request("GET", url, inject_header=False)