[PATCH 0 of 4] Add locate command

[Soh Tk-r28629]

> > > % python hg locate -i 'doc/*'
> > > ^(?:doc\/.*)/
> >
> > That should print the same thing.  This is a bug.
> 
> Actually, it's not a bug, but it points out that the man page entry
> could do with some robustification.
> 
> What that means is "look under any subdirectory of doc".

Ya, I just read about the -i option. My bad. BTW, any reasons why you don't permit directory specification, ie. 'doc/*', in the file patterns, but have to do it through -i?