Added dirichlet noise to the initial move

[starovp]

trafficstars

Hi!

I added dirichlet noise for the root node for all valids, as mentioned in the original paper.

[bhansconnect]

This is a pretty old library, you would probably be better using: https://github.com/kevaday/alphazero-general or https://github.com/bhansconnect/alphazero-pybind11

The first library is kinda a continuation of this library by someone else. I have helped them to improve it some and it is definitely faster.

The second library is my newest version and is many many times faster, but is mostly in C++ and is not as clean. It may not be worth using for many people.

[starovp]

Ah, gotcha. Yeah, I saw your second library. Was thinking of using C++, lots of work. My biggest impediment is the synchronous CUDA calls. I got some speedup just from compiling the game to .so using Nuitka, but raw C++ would probably be better. I'll take another look at that. Thanks!