Add a hook to allow use of a javascript image/upload and file browser

[hmoore71]

this is what I did to plugins/filebrowse/plugin.js

function browseServer() {             
     //mappro modification
     if (typeof editor.mappro === 'object'){
          var q = new BrowseImagesDialog(editor.mappro.options.args, editor, params.CKEditorFuncNum);
     }else{
         // TODO: V4: Remove backward compatibility (#8163).
         editor.popup(url, ..........
     }
}

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 var editor = $('.desc').ckeditor().editor;
 editor.mappro = mappro;

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I will be using this in my Wordpress plugin IBS Mappro. I am also working on an upload too.

I would like the hook integrated more robustly though;

     if(typeof editor.userHookBrowser === 'object'){

     new editor.userHookBrowser.dialog(editor.userHookBowser.options, params.CKEditorFuncNum)