RFC: add .dir-locals.el

[Eli Zaretskii]

> Date: Fri, 13 Apr 2012 15:04:17 +0100
> From: Pedro Alves <palves@redhat.com>
> CC: Eli Zaretskii <eliz@gnu.org>, tromey@redhat.com,        gdb-patches@sourceware.org
> 
> I just tried this, and found it very annoying.  :-(  Any way to turn it off?

Yes, set enable-local-eval to t in your .emacs (untested).

But I don't like to ask all users do this, I'd like to find a better
solution.