Release v1.19.0 (for Beat Saber v1.17.0, v1.18.0)

See the README file for installation and usage instructions.

Adds:

• noteMissed event (#78, by @Protected)
• beatmap.noteJumpStartBeatOffset (#78, by @Protected)
• Documentation for the time event property

Fixes:

• cutPoint, cutNormal, and saberDir vectors of the Note Cut Object are now in note space (#77)
• Protocol documentation clarifications