Folder structure to prevent export bugs

[azerum]

I've noticed that usize is not exported in noeval.ts, even though usize doesn't use eval. I guess it's a bug, because in noeval.ts you had to export every serdes other than struct and number manually, and it's easy to forget to export something.

What about using such folder structure so it's harder to miss something:

• shared_serdes contains serdeses which can be used both in eval and noeval
• serdes contains serdeses which use eval
• noeval_serdes contains versions of serdeses from serdes, but without eval usage

There are 4 index files for every combination Node.js/not Node.js and eval/noeval. shared.ts contains common exports

[weisrc]

Nice, I am thinking of having everything be no-eval by default and having eval serdes under eval as #5 suggested.

[azerum]

Yes, I think it's good idea. Can be done like this: #10