Squashed commit of the following:

commit adabdc23bd2e3d107c5564ca67598af7645b1f36
Author: Dan Fornika <dfornika@gmail.com>
Date:   Mon Mar 25 17:28:24 2013 -0700

    Solved exercise 31: finding a protien motif

commit dd22edf55a771e60357448e582ea2fcde109af1d
Author: Dan Fornika <dfornika@gmail.com>
Date:   Mon Mar 25 17:10:35 2013 -0700

    Added files for exercise 31