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Chess engine: Walleye 1.5.2

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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=2590

v.1.5.2
Further reduced excess CPU usage
Fixed a bug related to capturing en passant
Some tweaks to the search, no major changes
Added check extension
Mate in X moves is now correctly reported in UCI rather than just a large negative or positive number


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