Updates based on CTA requirements

The updates to the WET cleanup plugin for TinyMCE add the following functions:

* Split a two or three column (middle empty) table into english and french parts, with the ability to detect paired english and french editors (using a mapping array) and paste appropriate content into each
* convert standard MS Word footnotes into WCAG compliant notes compatible with Web Usability templates
* add TOC generators from headings (again compatible with Web Usability templates)
* enhance the generalized cleanup routines for improved markup