Add 2nd slide as example

data/copy/define.md

@@ -0,0 +1,5 @@
+# Define
+
+PhantomJS is a headless WebKit scriptable with a JavaScript API. It has fast
+and native support for various web standards: DOM handling, CSS selector,
+JSON, Canvas, and SVG.

data/slide/02.json

@@ -0,0 +1,3 @@
+{
+  "copy": "define"
+}