In the Carousel example, added missing argument for carousel.showPane() function

Added missing boolean argument to showPane() function inside carousel()
function, was set to always animate. Already called with the boolean
argument from carousel.next(), carousel.prev() and
carousel.handleHammer().
Removed undefined constants

Removed undefined constants in carousel.handleHammer() in the Carousel
example. Replaced them with what the event fires ("left" and "right");
Merge pull request #383 from inorganik/master

Carousel example: several fixes