major improvements - attached patch & module archive

I would like to contribute some major changes to this module, attached to this issue you will find a patch for the current version (6.x-1.x-dev 2010-Jul-11) as well as an archive with the patched module included for convenience.

A dependency to the core upload module is introduced (for the importing features) and running update.php is required.

Changes include:
- keyword groups, these work by linking the first found keyword from a group and skipping the rest
- keyword weights inside groups as well as group weights, easy drag and drop handles to manage them
- several keyword linking limits, like maximum links per page, per paragraph, or with the same keyword per page and per paragraph, allow or disallow linking inside lists (ol, ul) or headings (h1, h2.. h6)
- allow or disallow linking to the same page the keyword is on
- allow or disallow linking inside node teasers, search results, RSS feeds, CCK text fields, Views node body and teaser fields, and CCK fields inside Views, filtering by view names, filter by content types
- ability to automatically set the link title (if left empty) based on the title of the target page (and being page_title aware)
- new mass-editing interface to edit all keywords on one page
- detect adding duplicate keywords and provide a verbose error message listing the conflicting keyword ID
- export or import (replace or append) the keywords list
- ability to exclude pages from linking by specifying the visible URL (and importing/exporting this list)
- it will leave the linked text untouched, explicitly not making changes in the case of the keyword on the page (for eg. the -dev version when configured to ignore case on a keyword "example, will replace "ExAmPLe" inside page text with "example" from the keywords list page, this has been fixed)
- for a keyword like "example" it will not link the keyword inside a text like "example's etc", aware of logical word boundaries
- it has been tested to work good (speed wise) with ~500 keywords

You can see this module in action on the ChooseWhat.com website.

This has been sponsored by ChooseWhat LLC, and contributed back to the Drupal community in the spirit of open source and sharing. If you accept this patch into the module, we would appreciate it if you can post a link on the front page mentioning this and having this text:
ChooseWhat.com a website geared towards internet business solutions.

Thank you! hope you find this useful, and let me know if you need further assistance from me to integrate the patch