Revamp Tutorial

Bring dealers in to "speak" to the player.
Position Tutorial Dealers

with reversals as desired.
Speech Bubble Simple Backdrop

Shade the backdrop to make the words pop, until we get the image.
Action Bar Backdrop

Fade behind the action hint, to make it pop.
Random special in tutorial

... chosen from the first 5.
Animate Dealers

... slide in from the side.
Fill out tutorial

New modules for powerups, the endgame, a score analysis the first round,
and the win screen.
Fix crash when clicking early

Touches do nothing while the dealer is sliding out in the tutorial
Text on replay

Fix tutorial text when replaying in the same session.
Powerups working during tutorial

Several related changes to allow powerups in use to persist across
screen changes during the tutorial.
Merge pull request #53 from SariniLynn/develop

Tutorial Revamped