Added script layout

Author: jonasViehweger

_layouts/script.html

@@ -0,0 +1,20 @@
+---
+layout: default
+---
+
+<h1 class="d-inline" id="normalized-difference-vegetation-index">  {{page.title}} </h1>
+<p class="label label-green mb-5"> {{ page.parent }} </p>
+
+{% assign paths = page.dir | remove_first: "/" | split: "/" | join: "-"%}
+<p class="mt-lg-4">
+    <button class="btn btn-primary" id="toggle-script" onclick="toggleScript()">Show Script</button> 
+    <a href="{{ page.dir | append: 'script.js' }}" class="btn" target="_blank" download="{{paths | append: '.js'}}">Download Script</a>
+</p>
+
+<div id="script" style="display:none;"> 
+{% highlight javascript %}
+{% include_relative script.js %}
+{% endhighlight %}
+</div>
+
+{{content}}