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.

src/scripts/analytics.js

@@ -1,4 +1,4 @@
-(function () {
+(function () {
     var bgPage = chrome.extension.getBackgroundPage();
     if (!bgPage) {
         return;