added github pages support

docs/js/out/website/notebook.cljs

@@ -0,0 +1,7 @@
+(ns website.notebook)
+
+(def root "http://nbviewer.jupyter.org/github/didiercrunch/graphly/blob/master/")
+
+(defn notebook [name msg]
+  (let [url-safe-name (js/encodeURIComponent name)]
+    [:a {:href (str root url-safe-name)} msg]))