Add Euler rotation.

Only XYZ order.
Need to manually update rotation or quaternion on each change.
Add key controls to Ship test.
Add Collision test boilerplate.
Add Box3 setFromObject() method.
Test Collision bounding box intersection with basic gameplay.
Remove Geometry computeBoundingBox() method.

Does not compute bounding boxes in world space.
Add basic ADSR envelope.
Add waveform plotting.
Add support for variable length audio files.

Begin cleanup of audio tests.