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Chess engine: Walleye 1.6.0

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Walleye is a UCI-compatible engine written using the classical alpha-beta style AI. It supports loading board positions from arbitrary FEN strings, Unicode pretty printing to the console, and UCI communication logs to help with debugging.
Originally this project was meant as a first introduction to rust and chess programming, but it got a bit carried away.
Author: Mitchel Paulin  Rating CEDR=2146

v.1.6.0
Moved to 2021 edition of Rust
Added three fold draw detection supported by Zobrist Hashing
Misc bug fixes


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