I'm following the tutorial in umbraco tv on extending umbraco and when I try to add a controller for my property editor I get this error message in the console. "Argument 'Example.CharLimitController' is not a function, got undefined" I've tripple checked my code and it's exactly the same as in the video. I'm using Umbraco 7.2.4 as it was the version used in the video.

package.manifest

{
  propertyEditors: [
    {
      alias: "CharLimit",
      name: "Char Limit",
      editor: {
        view: "~/App_Plugins/Example/charlimit.editor.html"
      }
    }
  ],

  javscript: [
    "~/App_Plugins/Example/charlimit.controller.js"
  ]
}

charlimit.controller.js

angular.module("umbraco").controller("Example.CharLimitController", function () {

    alert("Hello World!");

});

charlimit.editor.html

<div ng-controller="Example.CharLimitController">
    <textarea cols="10" ng-model="model.value"></textarea>
</div>