Added support for older advice package

My Emacs (24.3.1) doesn't have 'advice-add'. From what I understand this function was added in 24.4 in package 'nadvice'.
With this patch clojure-quick-repls will work with both old 'advice' and new 'nadvice' packages.

I took 'defadvice' call from the 265e5de4192f3516e98a7667c34dbbe39cd67f71 diff -- I'm not sure if it is correct.