CTL_STATUS_t ctl_xively_feed_register_datastream(CTL_XIVELY_FEED_t *self, CTL_XIVELY_DATASTREAM_t *stream);
ctl_xively_feed_register_datastream registers an initialized datastream stream with the feed self. You must register datastreams with a feed before posting datapoints to the datastream and before pushing the datastreams to Xively.
ctl_xively_feed_register_datastream returns a standard status code.