App refactor (#140)

* Add additional types
* Split components from single index module into smaller modules
* Misc smaller changes

app/src/bridge/lib/messaging.ts

@@ -0,0 +1,15 @@
+"use strict";
+
+import { DecodeTransform, EncodeTransform } from "../../transforms";
+import { Message } from "../types";
+
+
+export const decodeTransform = new DecodeTransform();
+export const encodeTransform = new EncodeTransform();
+
+process.stdin.pipe(decodeTransform);
+encodeTransform.pipe(process.stdout);
+
+export function sendMessage (message: Message) {
+    encodeTransform.write(message);
+}