Add type definitions for rcloader.

rcloader/rcloader-tests.ts

@@ -0,0 +1,11 @@
+/// <reference path="./rcloader.d.ts" />
+
+import rcloader = require("rcloader");
+
+const rcLoader = new rcloader.RcLoader(".configfilename", {
+    lookup: true
+});
+
+rcLoader.for("foo.json", (err, fileOpts) => {
+    // send the file along
+});