Add dropped text-justify

docs/_includes/css/type.html

@@ -201,6 +201,7 @@ You can use the mark tag to <mark>highlight</mark> text.
 <p class="text-left">Left aligned text.</p>
 <p class="text-center">Center aligned text.</p>
 <p class="text-right">Right aligned text.</p>
+<p class="text-justify">Justified text.</p>
 <p class="text-nowrap">No wrap text.</p>
 {% endhighlight %}