Setup Webpack & TypeScript (#316)

* TypeScript and WebPack.

* Minor cleanup.

* Add background.js as entry point to webpack.

* Use downloaded fonts for better performance.
Remove google-fonts-webpack-plugin.

* Add the remaining entry points and setup notification bar.

* Update readme for webpack.

* Convert CipherItems to TypeScript to demonstrate how a component looks in TS.

* Fix edge requirering a custom angular version.

* Rewrite gulp tasks for packaging releases.

* Re-add the webpack gulp plugin.

* Remove unessesary line in analytics.

tsconfig.json

@@ -0,0 +1,13 @@
+{
+  "compilerOptions": {
+    "noImplicitAny": true,
+    "module": "es6",
+    "target": "ES2016",
+    "allowJs": true,
+    "sourceMap": true
+  },
+  "exclude": [
+    "node_modules",
+    "dist/**"
+  ]
+}