OBS.Beat pseudotype will help manage BPM-related functionality

[StartAutomating]

Having a central beat clock will make things easier to manage, at least when it comes to music.

Starting basic, we'll need to expose the psuedotype within the OBS object:

• $OBS.Beat should be an OBS.Beat singleton #186
• OBS.Beat.BPM should get and set the BPM #187

To do anything extra fun, we'll also need to know when the beat started:

• OBS.Beat.BeatStart should get and set the [DateTime] the beat started #188

Once we have this piece of information, we can begin to derive more information:

• OBS.Beat.Duration should get (and set) the duration of the beat #189
• OBS.Beat.BeatCount should return the number of beats since the beat started #190

We'll want to make setting a .BPM and .BeatStart easy:

• OBS.Beat.TapBPM() should let a BPM be tapped out #191

Then we'll want to get creative:

• OBS.Beat.Sin/Sine should return the sine of the current beat #192
• OBS.Beat.Cos/Cosine should return the cosine of the current beat #193
• OBS.Beat.Angle should get the current beat, expressed as an angle #194

We will want to manage BPM with timers and events

• OBS.Beat.Timer should get and set the [Timer] used to track BPM #195