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.

webpack.dev.js

@@ -0,0 +1,24 @@
+const merge = require('webpack-merge');
+const common = require('./webpack.common.js');
+
+module.exports = merge(common, {
+    devtool: 'inline-source-map',
+    module: {
+        rules: [
+            {
+                test: /\.less$/,
+                use: [
+                    {
+                        loader: "style-loader"
+                    },
+                    {
+                        loader: "css-loader",
+                    },
+                    {
+                        loader: "less-loader",
+                    }
+                ]
+            }
+        ]
+    }
+});