JavaScript and optional stylesheet, then add `<div>`s to your page
that have special `class` attributes. We do the rest.
+Supported Browsers
+------------------
+
+Any modern browser will work fine. JavaScript must be enabled.
+
+* IE8 or later
+* Firefox 17 or later
+* Google Chrome 27 or later
+* Safari 6 or later
+* Opera 12 or later
+* iOS 6.x (iPhone, iPad)
+* Android 4.x
+
+Not supported: IE6, IE7
+
A minimal example
-----------------