TypeScript support

[laike9m]

Hi, is it possible to add a proper .d.ts file to support typescript? I'm using jsonpickleJS in a typescript project and have to add @ts-ignore to suppress the warning.

[mscuthbert]

I have not figured out a really good way to generate them. If you can point to one, please let me know. More likely I can imagine porting this to typescript completely, since it will help to remove all bugs, etc., but I don't think I'll have time over the next few months.

Thanks!