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.
Minor changes in comments.
Minor changes in comments.
Update README.md
Update README.md
Some minor changes on comments.
Update README.md
Some minor changes on comments.
Update README.md
Update README.md
Update README.md
Update README.md
Update README.md
Merge pull request #2 from Danziger/dev

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