Remove support for refs for now

It shouldn't be necessary for Cloact, since we can share data
between components using atoms. And it was broken and untested
anyway...

src/cloact/core.cljs

@@ -51,9 +51,6 @@
 (defn dom-node [comp]
   (.getDOMNode comp))
 
-(defn refs [comp]
-  (aget comp "refs")
-  #_(.-refs comp))
 
 
 (defn merge-props

src/cloact/impl/template.cljs

@@ -134,10 +134,7 @@
     (when (map? props)
       (let [key (:key props)]
         (when-not (nil? key)
-          (set! (.-key obj) key)))
-      (let [ref (:ref props)]
-        (when-not (nil? ref)
-          (set! (.-ref obj) ref))))
+          (set! (.-key obj) key))))
     (c obj)))
 
 (defn map-into-array [f coll]

test/demo.cljs

@@ -208,9 +208,9 @@ Hiccup-like syntax."]
   [:div
    [:h2 "Essential API"]
 
-   [:p "Cloact supports (almost) the entire React API, but there is
-   really only one entry-point that is necessary for most
-   applications: " [:code "cloact.core/render-component"] "."]
+   [:p "Cloact supports most of React's API, but there is really only
+   one entry-point that is necessary for most applications: "
+   [:code "cloact.core/render-component"] "."]
 
    [:p "It takes too arguments: a component, and a DOM node. For
    example, splashing the very first example all over the page would