Updated docs for List Metric Names.
List Metric Names
=================
-Returns a list of all metric names.
+Returns a list of all metric names. If you specify the prefix parameter, only
+names that start with prefix are returned.
------
Method
@@ -15,6 +16,8 @@ Request
http://[host]:[port]/api/v1/metricnames
+ http://[host]:[port]/api/v1/metricnames?prefix=[prefix]
+
----
Body
----
