Add confetti effect on game over

[dencee]

*Add confetti effect on game over
*Add constructor to Turkey class to initialize with a different image

[jaLeague]

I would prefer that there be two constructor variants. The new one with the option of changing the image for each turkey, but keep the original that uses the default (provided) turkey image for all.

Also, new constructor needs to resize image after loading.

Love the confetti addition!!

[dencee]

*Kept the original Turkey constructor
*Resized after loading turkey image
*Moved the background draw for the confetti to show up correctly.

Thanks for the review!

[jaLeague]

Unfortunately, moving the background draw to another part of the code means that the user can no longer know who won the race. For this implementation, the instruction to write "winner" on the race lane should be removed since it is never seen. Maybe rework it so the "race over" screen can also display who won ?