2.0.0 Alpha 3 Release

This is the 3rd Alpha Release of NNG 2.0, and it represents a lot of change in the HTTP support.

The main thing is that the APIs for HTTP have totally changed, and they should be much easier to use now. There is no easy conversion guidance, although simple server side applications should convert without too much difficulty.

Header files have changed for some things to make them easier as well, and a number of additional allocations have been removed.

Substantial progress on the mdbook conversion is here too.

There's still a lot more to do, but hopefully this builds enthusiasm!