[XSCH] new editors draft

Hi Jeff

I've nearly finished the changes we've been discussing.
I've still got to write new section 1.1 overview of this document, and 
add blurb at beginning of section 2 mentioning appendix B.


I'll do that in the morning and let you know.

My changes are checked in at:

http://www.w3.org/2001/sw/BestPractices/XSCH/xsch-sw/

(To others: this is very nearly a version to circulate to other WGs, 
more tomorrow)

Jeremy