Lots of bug fixes to setuptool.    Better error checking    Fixed bug where old .bkrc was read    Better checking to see whether mandatory fields are selected
Lots of bug fixes to setuptool.
   Better error checking
   Fixed bug where old .bkrc was read
   Better checking to see whether mandatory fields are selected

bk: 3a9b07c5qLso6ueVs95ETxvF7i4V9A
bitkeeper-scm/bitkeeper,bitkeeper-scm/bitkeeper,bitkeeper-scm/bitkeeper,bitkeeper-scm/bitkeeper,bitkeeper-scm/bitkeeper,bitkeeper-scm/bitkeeper,bitkeeper-scm/bitkeeper,bitkeeper-scm/bitkeeper,bitkeeper-scm/bitkeeper,bitkeeper-scm/bitkeeper,bitkeeper-scm/bitkeeper,bitkeeper-scm/bitkeeper