Implement Sass (#568)

* Move all images to assets/img

* Move all scripts to assets/js

* Move all webfonts to assets/webfonts

* Move all files to assets/files

* Move css to assets/css and add imports

* Adjust all references to assets folder

* Fix tor icon path

* Rewrite custom css to sass and add variables

* Change ?v on style.css to 5.

* Enable Sass minification

* Remove CryptoPaper-full.7z

assets/img/favicons/browserconfig.xml

@@ -0,0 +1,12 @@
+<?xml version="1.0" encoding="utf-8"?>
+<browserconfig>
+  <msapplication>
+    <tile>
+      <square70x70logo src="https://www.privacytools.io/img/favicons/mstile-70x70.png?v=2"/>
+      <square150x150logo src="https://www.privacytools.io/img/favicons/mstile-150x150.png?v=2"/>
+      <square310x310logo src="https://www.privacytools.io/img/favicons/mstile-310x310.png?v=2"/>
+      <wide310x150logo src="https://www.privacytools.io/img/favicons/mstile-310x150.png?v=2"/>
+      <TileColor>#da532c</TileColor>
+    </tile>
+  </msapplication>
+</browserconfig>

assets/img/favicons/manifest.json

@@ -0,0 +1,41 @@
+{
+	"name": "privacytools.io",
+	"icons": [
+		{
+			"src": "https:\/\/www.privacytools.io\/img\/favicons\/android-chrome-36x36.png?v=2",
+			"sizes": "36x36",
+			"type": "image\/png",
+			"density": "0.75"
+		},
+		{
+			"src": "https:\/\/www.privacytools.io\/img\/favicons\/android-chrome-48x48.png?v=2",
+			"sizes": "48x48",
+			"type": "image\/png",
+			"density": "1.0"
+		},
+		{
+			"src": "https:\/\/www.privacytools.io\/img\/favicons\/android-chrome-72x72.png?v=2",
+			"sizes": "72x72",
+			"type": "image\/png",
+			"density": "1.5"
+		},
+		{
+			"src": "https:\/\/www.privacytools.io\/img\/favicons\/android-chrome-96x96.png?v=2",
+			"sizes": "96x96",
+			"type": "image\/png",
+			"density": "2.0"
+		},
+		{
+			"src": "https:\/\/www.privacytools.io\/img\/favicons\/android-chrome-144x144.png?v=2",
+			"sizes": "144x144",
+			"type": "image\/png",
+			"density": "3.0"
+		},
+		{
+			"src": "https:\/\/www.privacytools.io\/img\/favicons\/android-chrome-192x192.png?v=2",
+			"sizes": "192x192",
+			"type": "image\/png",
+			"density": "4.0"
+		}
+	]
+}