mercurial.el, mq.el: remove runtime dependencies on CL package
* (require 'cl) at compile-time
* don't use map()
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.