Add restify definition

restify/restify-test.ts

@@ -0,0 +1,17 @@
+/// <reference path="restify.d.ts" />
+
+import restify = module("restify");
+
+var server = restify.createServer({
+  formatters: {
+    'application/foo': function formatFoo(req, res, body) {
+        if (body instanceof Error)
+            return body.stack;
+
+        if (body)
+            return body.toString('base64');
+
+        return body;
+    }
+  }
+});