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

_includes/card.html

@@ -30,7 +30,7 @@
                     {% endif %}
                 </a>
                 {% if include.tor %}
-                <a class="mb-1" data-toggle="tooltip" data-placement="bottom" data-original-title="{{include.tor}} Requires specific software to access: torproject.org" href="{{include.tor}}"><img alt="Tor" src="img/layout/tor.png" width="35"></a>
+                <a class="mb-1" data-toggle="tooltip" data-placement="bottom" data-original-title="{{include.tor}} Requires specific software to access: torproject.org" href="{{include.tor}}"><img alt="Tor" src="assets/img/layout/tor.png" width="35"></a>
                 {% endif %}
 
                 {% if include.extra_button %}
@@ -43,4 +43,4 @@
             </div>
         </div>
     </div>
-</div>
+</div>