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

index.html

@@ -0,0 +1,10 @@
+<!doctype html>
+<html class="no-overflow">
+<head>
+<script src="./dist/frontend.js"></script>
+<link href="./dist/frontend.css" rel="stylesheet"/>
+</head>
+<body>
+<app-main></app-main>
+</body>
+</html>