split off from wabac.js:

- add pageembeds.js for now
- new webpack build, use /sw.js in prod, /dist/sw.js in dev to work with webpack-dev-server single directory
- add wombat dependency and webpack build

src/sw.js

@@ -0,0 +1,15 @@
+"use strict";
+
+// Inited as Web Worker
+if (self.postMessage) {
+  const { WorkerLoader } = require('wabac/src/loaders');
+  const loader = new WorkerLoader(self);
+  console.log('ww init');
+} else {
+// Service Worker Init
+  const { SWReplay } = require('wabac/src/swmain.js');
+  self.sw = new SWReplay();
+  console.log('sw init');
+}
+
+