Patch to support Allegro Common Lisp

Hello,

I have produced a patch which allows LOCAL-TIME to support subsecond
resolution of time in Allegro Common Lisp. I produced it with git
format-patch and attached it to this email.  Hopefully, it'll be good
enough without further changes. Let me know if you need anything else.

Thank you.

Peter Keller

>From ae6325f7aadaf771f6ed86ad7c4893818351031e Mon Sep 17 00:00:00 2001
From: Peter Keller <psilord@cs.wisc.edu>
Date: Fri, 31 Jan 2014 15:57:26 -0600
Subject: [PATCH] Add support for subsecond resolution under Allegro.
Merge pull request #20 from dlowe-net/add-allegro-support

Patch to support Allegro Common Lisp