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Chess engine: Frozenight 3.0.0 NNUE (Windows and Linux)

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Frozenight - NNUE chess engine written in Rust. 
Rating CEDR=2880

v.3.0.0:
This release increases the size of the neural network (hidden layer size 32x2, up from 16x2) and further improves pruning during search. It also adds support for chess 960 (Fischer random chess). This release is approximately 220 elo stronger than version 2.1.0.

The release binaries are categorized by microarchitecture levels. The general rule of thumb is:
x86-64-v3 will work on modern (2015+) CPUs (avx2, bmi1, lzcnt, etc.)
x86-64-v2 will work on older (2009+) CPUs (popcnt, sse4, etc.)
x86-64 will work on any x86_64 CPU.

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