[tei-council] USE chapter

[Lou Burnard]

Somewhat later than hoped, I've now done some revision of the CF chapter 
in line with Council's desire that this should make clearer that there 
are many paths to the city of righteousness. In the process I also put 
in a place marker for a new section on ODD implementation and wrote an 
introductory para for the USE chapter itself (this was a trac item  
mysteriously associated with the AB chapter and previous assigned to 
Syd, so he owes me one!)