Add tcsh_completion to contrib

Add contrib script for generating tcsh completion source

patchbomb: fix up confusion between strings and lists of strings.

bash_completion: try to use bash3 features if they're available This does NOT break completion for bash 2.05b (I haven't tested earlier versions)

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.

Cleaned up hgweb.hgwebdir.run()

Use ConfigParser only in hgwebdir.__init__()

Don't create repo objects in hgwebdir, ui object is enough.

Reverted change 51f26e856f3d: Reading changelogs is too slow.

Use commit time instead of stat to check time of last change.

Remove the link from the template as there no real way to have it always be correct.

Make diffstat optional for patchbomb script.

Variable 'body' was missing in patchbomb script.

Adjusted test-hup for generated .hg/hgrc

Create [web] section with short username as contact on hg init and hg clone.