Attack type oaths

New features:

• Run end stats screen
• Oaths for attack types (Melee/Ranged/AoE)
• Added new player attack (multiple fireballs instead of Burn)
• Units are tinted when affected by certain stacks (e.g. Burn and Invincible)

Balancing:

• Capped Burn stacks at 10 (instead of 20)

Fixes:

• Thorned armor (it was doing something, but not what it was supposed to)
• Prevent incorrectly timed tutorial beats on run restart

Misc:

• (Windows only) Changed backend graphics from OpenGL to OpenGL ES via ANGLE
• Updated Steam SDK