[Doc] High level document

[hcoona]

Is there any high level design doc help people understand this project? For example:

1. The principle about why WDT could reach a high speed.
2. What's the best/typical scenarios for WDT
3. Comparion between WDT & traditional tools
4. The architecture of WDT

etc.

[ldemailly]

There is some of that in
https://github.com/facebook/wdt/wiki/FAQ
and
https://github.com/facebook/wdt/blob/master/README.md#design-philosophyoverview

but it could be expanded indeed (doc PR welcome!)

[hcoona]

They are useful, thanks.

[http403]

Hi. is there any news? I would like to use and understand it. A detailed documents of the protocol and how to use it as a library (steps to invoke each methods and what does each argument means) will be highly appreciated.