Setting allowWrap to 'false' to prevent slideshows from looping. More needs to be done to prevent next/prev buttons from appearing at the ends of a slideshow, however.

Signed-off-by: Matt Bernhardt <mjbernha@mit.edu>
Altering slideshow behavior to hide next/prev links now that we're no longer looping.

Signed-off-by: Matt Bernhardt <mjbernha@mit.edu>