Possible to create d.ts type definition file

[Chris2011]

I would like to use the properties lib inside my typescript application. I convert my js file to typescript for this I wanted to remove/reduce js. Please provide a type definitions file that I can use it inside my node typescript application. Thx.

[Diluka]

I put documentations on janslow#1, waiting @janslow to merge first

[hlovdal]

This is now pending in #35.