dispatch: move command dispatching into its own module
- move command dispatching functions from commands and cmdutil to dispatch
- change findcmd to take a table argument
- remove circular import of commands in cmdutil
- privatize helper functions in dispatch
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.