Tutorial Rework & Other Improvements

• Tutorial Level reworked - now with its own leaderboard!
• Grab stunts will show how long they were held while in the air
• Performance improvements
• Hand animation improvements
• Ricochet sfx added
• Fixed bugs where certain dialog would be stuck on the screen or game state would not advance

Please let me know if I've broken anything else in my endless iteration upwards.

-jc