fixed typos
New Clojure, Quil versions, with old versions commented out.

My Chapter 8 code needs more recent vesions of Clojure and Quil
than what was there when I forked it.  I'm using Clojure 1.6 and
Quil 2.2.1.  I've left the earlier verions (1.4.0 and 1.6.0,
respectively in project.clj, commented out.)