Add hello world example

presentation.tex

@@ -12,6 +12,11 @@
 \usepackage[english]{babel}
 \usepackage{hyperref}
 \usepackage{minted}
+\usepackage{upquote}
+
+\AtBeginDocument{%
+  \def\PYZsq{\textquotesingle}%
+}
 
 \begin{document}
 
@@ -141,9 +146,15 @@
 
 \section{Simple Examples}
 \begin{frame}[fragile]
-  \frametitle{Simple example}
+  \frametitle{Hello World}
   \begin{minted}{clojure}
-    (println ``Hello, world'')
+    (ns hello-world.core
+      (:gen-class))
+
+    (defn -main
+      "I don't do a whole lot ... yet."
+      [& args]
+      (println "Hello, World!"))
   \end{minted}
 \end{frame}
 \section{Resources}