Add Serializer plugins, and 'file' output plugin

plugins/serializers/influx/influx.go

@@ -0,0 +1,12 @@
+package influx
+
+import (
+	"github.com/influxdata/telegraf"
+)
+
+type InfluxSerializer struct {
+}
+
+func (s *InfluxSerializer) Serialize(metric telegraf.Metric) ([]string, error) {
+	return []string{metric.String()}, nil
+}