function changes + completion of scene 2 intro.

-Added createWillma function that will define willma and takes in the parameter shape. i.e createWillma(heart) will create a heart shaped willma
-Added resetWillma(shape) for the purposes of starting new scene. The flip function disables further transformation of the raphael object. Therefore, we destroy and create a new Willma after every scene or flip.
-Added willma moving 850 x positions while transforming from a heart back to a circle using transform + path change. transform method cannot be chained which is why we are doing it over a span of 10 seconds (instead of taking 10 1 second steps).