setuptools for mercurial-0.9.5

[Bryan O'Sullivan]

James Mills wrote:

> I personally never install different versions of anything
> but the patch I posted in my previous email will not
> use setuptools if it isn't installed.

I'm afraid it needs to go a step further, and only use setuptools if 
given an option to turn it on.  I have setuptools installed because it's 
needed by other Python packages, so your current approach won't work.

	<b