Add ‘six’ to install_requires in setup.py - #34

(foobar3) mbp-op-226:~/ox/github/OX3-Python-API-Client(fixes)$ nosetests -sxv tests
test_authorize_token (test_client.TestClient) ... ok
test_delete (test_client.TestClient) ... ok
test_fetch_access_token (test_client.TestClient) ... ok
test_fetch_request_token (test_client.TestClient) ... ok
test_get (test_client.TestClient) ... ok
test_logoff (test_client.TestClient) ... ok
test_logon (test_client.TestClient) ... ok
test_options (test_client.TestClient) ... ok
test_post (test_client.TestClient) ... ok
test_put (test_client.TestClient) ... ok
test_upload_creative (test_client.TestClient) ... ok
test_validate_session (test_client.TestClient) ... ok
test_loads_alternate_env (test_clientfromfile.ClientFromFileTestCase) ... ok
test_loads_default_env (test_clientfromfile.ClientFromFileTestCase) ... ok
test_loads_optional_options (test_clientfromfile.ClientFromFileTestCase) ... ok
test_missing_required_option_raises_error (test_clientfromfile.ClientFromFileTestCase) ... ok
test_returns_client (test_clientfromfile.ClientFromFileTestCase) ... ok

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Ran 17 tests in 0.535s

OK