Initial commit, basic web page with reagent component is working

src/heyarne/rect_packing/core.cljs

@@ -0,0 +1,14 @@
+(ns heyarne.rect-packing.core
+  (:require [reagent.core :as r]
+            [reagent.dom :as dom]))
+
+(defn main []
+  [:main
+   [:h1 "Hello world"]
+   [:p "This is a starting point"]])
+
+(defn ^:dev/after-load init []
+  (println "Initializing…")
+  (dom/render [main] (.querySelector js/document "#app")))
+
+(defonce app (init))