Added options for looping and hiding previous/next links.  JQM touch swipe fix.

- Solves issue #16 by adding new event listeners for 'load' as suggested by @Zgraham
- Adds new option for looping which is false by default, meaning that once the final slide triggering next() will no longer go to the "next" slide.  Same goes for prev().
- Adds new option for supplying a previous and next element id so that when the first or final slide is reached the se elements are hidden from view.  If the user then returns to one of the inner slides the next/previous elements will return.