bisect: propagate ancestor lists directly to children
- calculate the children of all candidates
- for each candidate, combine ancestor lists
- pass ancestor lists to children
- store ancestor count
This eliminates the O(n**2) memory usage, while maintaining about the
same performance.
Basic install:
$ make # see install targets
$ make install # do a system-wide install
$ hg debuginstall # sanity-check setup
$ hg # see help
See http://www.selenic.com/mercurial/ for detailed installation
instructions, platform-specific notes, and Mercurial user information.