Merge pull request #234 from vikramraman/add-readme-wavefront

Added Wavefront Client to README

README.md

@@ -165,3 +165,4 @@ Clients are available for the following destinations:
 * DataDog - https://github.com/syntaqx/go-metrics-datadog
 * SignalFX - https://github.com/pascallouisperez/go-metrics-signalfx
 * Honeycomb - https://github.com/getspine/go-metrics-honeycomb
+* Wavefront - https://github.com/wavefrontHQ/go-metrics-wavefront