Docstring documentation for transport kwarg

Add transport param to API.__init__ docstring

Author: Adam Venturella

magento/api.py

@@ -96,6 +96,8 @@ def store_views(self):
         :param full_url: If set to true, then the `url` is expected to
                     be a complete URL
         :param protocol: 'xmlrpc' and 'soap' are valid values
+        :param transport: optional xmlrpclib.Transport subclass for
+                    use in xmlrpc requests
         """
         assert protocol \
             in PROTOCOLS, "protocol must be %s" % ' OR '.join(PROTOCOLS)