add popper.js

public/vendor/popper.js/docs/_includes/example10t-code.html

@@ -0,0 +1,13 @@
+<h2 id="example10" tabindex="0"></h2>
+<p id="example10Title">
+    The available placements are the same you are used to with Popper.js:
+</p>
+
+<div id="example10code">
+{% highlight javascript %}
+new Tooltip(referenceElement, {
+    placement: 'top', // or bottom, left, right, and variations
+    title: "Top"
+});
+{% endhighlight %}
+</div>