Add metrics-splunk

docs/source/manual/third-party.rst

@@ -24,3 +24,4 @@ the many third-party libraries which extend Metrics:
 * `metrics-cdi <https://github.com/astefanutti/metrics-cdi>`_ provides integration with `CDI <http://www.cdi-spec.org/>`_ environments
 * `metrics-aspectj <https://github.com/astefanutti/metrics-aspectj>`_ provides integration with `AspectJ <http://eclipse.org/aspectj/>`_
 * `camel-metrics <https://github.com/InitiumIo/camel-metrics>`_ provides component for your `Apache Camel <https://camel.apache.org/>`_ route
+* `metrics-splunk <https://github.com/zenmoto/metrics-splunk>`_ provides a reporter for `Splunk <http://www.splunk.com/>`_