Added documentationfor write method

Author: aviau

influxdb/client.py

@@ -174,6 +174,7 @@ def request(self, url, method='GET', params=None, data=None,
             raise InfluxDBClientError(response.content, response.status_code)
 
     def write(self, data):
+        """ Provided as convenience for influxdb v0.9.0, this may change. """
         self.request(
             url="write",
             method='POST',