Hi I am trying to implement the new image caption feature of tinyMCE 4.3 -https://goo.gl/OoDcyq

To implement I have downloaded the files from https://goo.gl/YXWL7y and have overwritten the existing TinyMCE files in ~/Umbraco_Client/Tinymce3/Plugins/caption (caption being the new folder) to update the TinyMCE version in my Umbraco v6.2.5 backend (suggested by an independant Umbraco source).

In tinyMceConfig.config i have added the following lines -

<command>
      <umbracoAlias>mceCaption</umbracoAlias>
      <icon>images/editor/myimage.gif</icon>
      <tinyMceCommand value="" userInterface="true" frontendCommand="mceCaption">caption</tinyMceCommand>
      <priority>76</priority>
    </command>

and in the plugins section of the same file -

 <plugin loadOnFrontend="false">caption</plugin>

I am stuck on this step i.e where to initialize the plugin using the following code

tinymce.init({
  selector: "textarea",  // change this value according to your HTML
  plugins: "image",
  menubar: "insert",
  toolbar: "image",
  image_caption: true
});

Any suggestions as at present the Rich Text Editor does not show in the backoffice.

Any help is much appreciated.