bash_completion: small cleanup and bugfix _hg_count_non_option wasn't taking global options into account while counting non-option arguments. It also used only its first argument.

teach bash_completion about --cwd

bash_completion: better handling of aliases Instead of listing every alias in the big case..esac, use hg help to get the canonical name of the command.

bash_completion: update for new help output format

Add test-grep.out file for now.

Merge with TAH.

grep: extend functionality, add man page entry, add unit test. walkchangerevs now returns a two-tuple. Its behaviour is also extensively commented. The annotate command's getname function has been factored out to a new function, trimname, so it can be shared between annotate and grep. The behaviour of grep has been beefed up, so that it now performs a number of useful functions.

grep: change default to printing first matching rev. Printing of every matching rev remains via --every-match/-e switch.

Documented passing list or dict instead of config file in hgwebdir.cgi

Allow list of (virtual, real) or dictionary to be passed to hgwebdir.