New (major) version released (not compatible with previous one).

 - Methods to remove pages added.
 - Feature to change class names used added.
 - Feature to add button elements linked to each page to indicate the
   current one added.
 - Custom callbacks and method to enable and disable them added.
 - Feature to change CSS property used to trigger callbacks (after
   transitionEnd event) added.
 - Minor code improvements.
 - Feature to add loading class to pages added.