Added new cup graphic and transition on timer start and stop.

- New cup graphic and #animation section has 4 parts:
	* cup_front is the half of the cup closest to the user.
	* cup_back is the half of the cup farthest from the user.
	* #cup-tea is an ellipse shaped div that rises and falls between #cup_front and #cup_back such that the cup appears to be filling and draining with tea.
	* #cup-steam appears above (in both the z and y dimensions) the cup.
	* On Start, the cup appears to fill with tea on par with the sound effect and finishes with steam appearing. On Stop, the cup quickly drains and the steam quickly disappears.
- doTransition() was modified to implement the aforementioned details.