Amon output

closes #350

outputs/amon/README.md

@@ -0,0 +1,9 @@
+# Amon Output Plugin
+
+This plugin writes to [Amon](https://www.amon.cx)
+and requires an `serverkey` and `amoninstance` URL which can be obtained [here](https://www.amon.cx/docs/monitoring/)
+for the account.
+
+If the point value being sent cannot be converted to a float64, the metric is skipped.
+
+Metrics are grouped by converting any `_` characters to `.` in the Point Name.