Initial commit with decorator router, and some basic subsonic api code

index.ts

@@ -0,0 +1,14 @@
+'use strict';
+
+import '@tsmetadata/polyfill';
+import Koa from 'koa';
+import {SubsonicRouter} from "./src/subsonic/router";
+
+try {
+    const app = new Koa();
+    (new SubsonicRouter()).injectInto(app);
+
+    app.listen(8080);
+} catch (e) {
+    console.error(e);
+}