lots of fixes to get exclude working (off-by one errors in the     checkmark code -- still not working fully
lots of fixes to get exclude working (off-by one errors in the 
   checkmark code -- still not working fully

bk: 39a1eb15xKb9ZaQYCxtHC5_u_MCZ9g
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