BrightcoveOS/Diamond — pull request #652 by choplin (2014-06-17 15:15:34+00:00)
Title: fix a bug of extended postgres collector

registry must respond to append method because it is called in this line
https://github.com/BrightcoveOS/Diamond/blob/77760a2676f3cada3cdc3cc5628a251985616d7f/src/collectors/postgres/postgres.py#L90