2013-01-30: added example wisp file

added example wisp file

diff --git a/example.w b/example.w
new file mode 100644
--- /dev/null
+++ b/example.w
@@ -0,0 +1,7 @@
+defun a
+  let
+    : d e
+      : f
+      : g
+  h i
+  . j