DataDog/dd-agent — pull request #36 by conorbranagan (2012-04-25 21:38:22+00:00)
Title: Don't send None values for metrics

* Ignore None values when reading from RRD files
* Only update the start timestamp up to the last non-None metric
* Update the tests to check this and to use dumped XML files (converted to RRDs in the test) instead of RRDs directly which can change.