oscarleiva/energylink

bergquist ed661767f8 follow go idiom and return error as second param		8 lat temu
..
graphite.go	ed661767f8 follow go idiom and return error as second param	8 lat temu
graphite_test.go	fc91231104 Fixed failing tests	9 lat temu
types.go	8d5857661e refactor(tsdb): changed tsdb time series model to use null.Float instead of pointers	9 lat temu