Add another file to the demo, to test the ever-repeating page 2 bug.
Use jquery-ias.js from the ../dist folder instead of raw github master, to
get around the undefined jQuery.ias error in the demo. Get Evan's name
off of the commit.
Update the demo files to use a navigation ID instead of a navigation CLASS,
to fix the problem where the navigation section is not hidden, and the
navigation section of the old page is not overwritten with that of the
new page.
Update the documentation to reflect this.