add rotateX and rotateY api

[axelpale]

Seems okay to me. Anyone else having thoughts?

[Gitsifu]

            move('.square')
                    .set('background-color', 'red')
                    .duration(1000)
                    .end(function(){
                        move('.square')
                                .set('background-color', 'blue')
                                .duration(1000)
                                .end();
                    });

The above writing method is changed to the following writing method. Now it has no effect. Can it be made effective?

            move('.square')
                    .set('background-color', 'red')
                    .duration(1000)
                    .set('background-color', 'blue')
                    .duration(1000)
                    .end();