Mobile hover (#72)

* Restore onTouch article card style

* Minify Katex files

* Fix date on li-next

* Add ontouch to htmlvalidator ignore

layouts/_default/li.html

@@ -1,4 +1,5 @@
-<a href="{{ .Permalink }}" class="card blog-card" rel="bookmark" >
+<a ontouchstart="cardPressed.call(this)" ontouchend="cardReleased.call(this)" ontouchmove="cardReleased.call(this)" 
+  href="{{ .Permalink }}" class="card blog-card" rel="bookmark" >
   {{ with .Resources.GetMatch "featuredImage" }}
   <div class="card-img-container">
     <picture>