Replace blur property with shadowBlur in LambertGlowMaterial.

Add shadow glow to ship.
Increase font-sizes.
Clamp Material globalAlpha to [0, 1].
Integrate collision test and link to end state.

Remove unused default function parameters.
Need to refactor collision box position randomization.
Add slow-motion effect on game end.

DRY camera and collision box positioning.
Add explosion sound effect.
Add Sprite class.
Add Explosion test.
Add Box3 expandByScalar() function.

Requires adding Vector3 addScalar() as well.
Add camera tracking along x-axis. Shrink ship bounding box.