Create a Bangle.isWorn() method

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Ganblejs in reply to @splch
In the case when the user mostly keeps the bangle on them, maybe it could be assumed the ambient temperature is a couple degrees lower than the 'wearing temperature'?

So maybe there would be three temperature measurements:
- 'Ambient temperature' measured when the bangle is probably not worn and not charging.
- 'Wearing temperature' measured when the bangle is worn.
- 'Assumed ambient temperature' which would be a set number of degrees lower than 'wearing temperature'.
When the last 'ambient temperature' reading became too old then 'assumed ambient temperature' would take it's place.

But I also suspect that Gordon might be right :p.

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splch in reply to @Ganblejs
I just gave it a shot yesterday with the Bangle.getHealthStatus().movement method works great! Temperature adds some inference but I included the data as well.

Without temperature, the model has a 99.2% accuracy :)

The decision tree function is:
```
function isWorn() {
    if (Bangle.isCharging())
        return false;
    if (Bangle.getHealthStatus().movement > 146)
        return true;
    return false;
}
```
2 Attachments
- worn data.csv
- Predict isWorn.pdf

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Ganblejs in reply to @splch

Cool 😎

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