[Patch] Mercurial support

[Vlad Skvortsov]

Luke Kenneth Casson Leighton wrote:
> if the same concept for "local comments" is applied - "local"
> numbering - to "issues", then there can never be a conflict - ever.
> reason: only when an issue is committed to the central repository will
> it be given a real "global" number.
>   

The concept *is* there, but we rely on Subversion in conflict 
*detection*. I'm not sure if it's feasible with other [distributed] 
version control systems. I'm not saying it's infeasible, I just don't know.

-- 
Vlad Skvortsov, vss at 73rus.com, http://vss.73rus.com