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kotlinlang

<@U5MPVGMQD> `Some(null)` makes sense in programs that treat null as a valid values but agreed it should be avoided. The reason why we support it is because otherwise it can yield undesired behaviors for programs that inter-op with java and receive null as valid values. <https://stackoverflow.com/questions/5796616/why-somenull-isnt-considered-none> Additionally I believe the other way around it would violate some of the identity laws in some of the type classes (untested).

As for `none()` and `None` they are the same:
```
fun &lt;A&gt; none(): Option&lt;A&gt; = None
```