ERT - Table Techniques

I've updated the ERT with new techniques for table repair. Please take a
look at:

http://www.w3.org/WAI/ER/IG/ert/#Technique5.1.A (headers)
http://www.w3.org/WAI/ER/IG/ert/#Technique5.2.A (multiple headers)
http://www.w3.org/WAI/ER/IG/ert/#Technique5.3.A  (layout tables)
http://www.w3.org/WAI/ER/IG/ert/#Technique5.4.A  (markup for formatting)
http://www.w3.org/WAI/ER/IG/ert/#Technique5.5.A  (summary)
http://www.w3.org/WAI/ER/IG/ert/#Technique5.6.A   (abbreviations)

Please take a look and let me know if you have any comments.

There doesn't seem to be a guideline for table captions but it is dealt with
in the WAI note:
http://www.w3.org/TR/WAI-WEBCONTENT-TECHS/#data-tables

Should we add an evaluation/repair for table captions?

Chris