RFC: rewrite hgmerge in Python

[Thomas Arendsen Hein]

Hi!

As hgmerge grows more and more into an all-purpose-ready-to-run
script and portability issues with various shell dialects, Windows
and MacOS X bite us quite often (latest example is issue190), I
suggest rewriting it in Python.

The code gets complicated, so having a real programming language is
a bonus, too.

To keep the code separate (and easily interchangeable) from the
Mercurial core, but still have every feature of the core available,
I can imagine adding it as an extension instead of a separate Python
script.

Comments?

Thomas

-- 
Email: thomas at intevation.de
http://intevation.de/~thomas/