[imp] Sieve app gets made more usable...

[Mike Cochrane]

Quoting Jan Schneider <jan@horde.org>:

> > I'm happy for this to go into CVS if there's interest.
> 
> Definitely.
> 
> Jan.

Could someone please create a module for it then. 

It doesn't have an ikea style name, it's just called sieve here, but if someone
comes up with one soon then i'm keen to take it. It will make the code and
comments more comprehendable if the app wasn't called Sieve.

- Mike :-)