Add Report and Server documentation.

support/reference/Report.md

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+Report tracks multiple metric instruments in a structured way with namespaces.
+
+Report implements: [`addMetric()`](#Report.addMetric), [`getMetric()`](#Report.getMetric), [`summary()`](#Report.summary)
+
+### Instantiate
+`Report` is an exported constructor in `metrics`.
+
+```
+var metrics = require('metrics'),
+    report = new metrics.Report();
+
+report.addMetric('namespace.name', new metrics.Counter());
+report.addMetric('counter', new metrics.Counter());
+report.summary(); // {...}
+```
+
+Metrics can be structured by using namespaces, to put an instrument behind a namespace include the namespace before the metrics name followed by a period(e.g. `namespace.name`).
+
+You can also include metrics already being tracked when instantiating the report. To do this, when you create an instance give it an object in the format
+```
+{
+  namespace: { name: new metrics.Counter() },
+  '': {counter: new metrics.Counter()} // Items without a namespace
+}
+```
+
+### .addMetric
+`Report.addMetric(eventName, metric)`
+
+Add a new metric instrument to the given event name.
+
+### .getMetric
+`Report.getMetric(eventName)`
+
+Retrieve the metric for the given event name.
+
+### .summary
+`Report.summary()`
+
+Get a summary of the metric instruments being tracked in a readable format.

support/reference/Server.md

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+Server is an HTTP server that prints summaries for a `Report`.
+
+Report implements: [`addMetric()`](#Server.addMetric)
+
+### Instantiate
+`Server` is an exported constructor in `metrics`.
+
+```
+var metrics = require('metrics'),
+    server = new metrics.Server(3000);
+
+server.addMetric('namespace.name', new metrics.Counter());
+server.addMetric('counter', new metrics.Counter());
+```
+
+The server takes a port argument, and optionally a object of metrics to track, for this format please check the `Report` instantiation documentation.
+
+The server responds with the report summary in JSON format at the endpoint `/metrics`.
+
+For more advanced usage of reporting, you can use the `Report` constructor and create an HTTP server that responds however you'd like.
+
+### .addMetric
+`Report.addMetric(eventName, metric)`
+
+Delegated to the servers Report instance.