obsstore: add a `parents` field
This field is intended to store the parent of the precursor. This is useful to
attach pruned changesets to a set of exchanged changesets. We currently just
add the fields with a None value. None stands for "no data recorded".
Mercurial
=========
Mercurial is a fast, easy to use, distributed revision control tool
for software developers.
Basic install:
$ make # see install targets
$ make install # do a system-wide install
$ hg debuginstall # sanity-check setup
$ hg # see help
Running without installing:
$ make local # build for inplace usage
$ ./hg --version # should show the latest version
See http://mercurial.selenic.com/ for detailed installation
instructions, platform-specific notes, and Mercurial user information.