expand paths to local repository or bundle in appropriate classes
This avoids problem with unexpanded paths when it's not possible to
expand it at higher level (for example, if file:~/path/ is supplied as
path in schemes).
Basic install:
$ make # see install targets
$ make install # do a system-wide install
$ hg debuginstall # sanity-check setup
$ hg # see help
See http://mercurial.selenic.com/ for detailed installation
instructions, platform-specific notes, and Mercurial user information.