Clean up the reverse formatter loop in publish and remove the value condition at…

… the end. [Closes #97]

@@ -70,17 +70,14 @@ class Rivets.Binding
   # Publishes the value currently set on the input element back to the model.
   publish: => 
     value = getInputValue @el
-    if @formatters
-      i = @formatters.length-1
-      while(i > -1)
-        formatter = @formatters[i]
+
+    for formatter in @formatters.slice(0).reverse()
       args = formatter.split /\s+/
       id = args.shift()
-        # only re-assign if there is a two-way formatter.
-        if Rivets.formatters[id] and Rivets.formatters[id].publish
+
+      if Rivets.formatters[id]?.publish
         value = Rivets.formatters[id].publish value, args...
-        i--
-    if(value)
+
     Rivets.config.adapter.publish @model, @keypath, value
 
   # Subscribes to the model for changes at the specified keypath. Bi-directional