JNumber should be Number not double

[delebedev]

From my point of view, it's really annoying that all values are encoded and decoded as double, in some cases this behaviour might be even buggy.
I propose to let caller side decide how to unwrap returned Number - as Double, Int, whatever

[lingoer]

Nice idea.
It did bothered me, too.
In one of the first commits it was a NSNumber, But, I Changed that later.
Because I don't want any NSThings come out from the value ------ The Cocoa things always comes with implicitly-unwrapped-optionals. Which I think , is not following the fundamental ideas of Swift language.
If there has a way simple and explicit as basic types yet functional as NSNumber, I'd be very happy to use that.
I need a few time to think about it.

[lingoer]

I give up.
Chosen NSNumber finally.
Addition two methods provided