[Distutils] Deprecate and Block requires/provides

[Donald Stufft]

Arguably it's already broken. I've had to explain to a number of people that it won't cause their dependencies to install. I think its way more user friendly to tell them up front then to confuse them when it doesn't work or when it appears to work but they get an error from a - 

Packaging is confusing enough without leaving foot guns littered through it. 

> On Oct 17, 2013, at 6:04 AM, Nick Coghlan <ncoghlan at gmail.com> wrote:
> 
> Don't break things when they don't pose an immediate security threat (and sometimes not even then) :)