Build a custom CKEditor 3 plugin.

We need to have a custom plugin built for CKEditor 3. This plugin is for editing a particular attribute of an element. With features as follows: 1. Tooltips (i.e. a span or div elements containing the "toolTip" attribute) already existing in the html content being handled by CKEditor WYSIWYG should be recognised by this plugin and rendered within the content window as a right-clickable element (much like img elements currently are by default). 2. Right-clicking on them, brings up a context menu much like that for an image. Options within the context-menu: “Edit”, “Delete”, “Copy to clipboard” 3. “Edit” brings up a dialog box which allows you to edit the html for that tooltip, ideally the tooltip’s HTML should be edited using a nested CKEditor with it’s own unique config and it’s own unique style-sheet 4. “Delete” and “Copy” are self-explanatory. 5. Once a tooltip is edited, the plugin makes an ajax call to the web application REST API in order to save the edit to the back-end. NOTE: that we are looking for someone who has demonstrable prior experience in building plugins for CKEditor3. You must be able to demonstrate such skill to get the work, so please don't apply unless this is you. We would expect an estimation for the work (in hours) as part of your application.