Fix stupid mistake which made checker desync almost always

update cmake files to use the two libraries independently

Found another possible source of desync, trying similar workaround on this

split extras and src

Forbit guest checkers

use standard library prefix

Workaround hGetContents blocking all threads with my own version of the function

reopen and update branch

Workaround desync issue if I correctly understand its roots (barely tested)

fix compiling on osx when you have multiple linkers installed

Some fixes

pretty sure esc here is just a holdover from past, and has no use in rearranged implementation.

Parse engine output to deside whether simulation ran to the end

Clear player's clan info on room join

Disallow kicking the opponent in duel

Update Hedgeroid to current JNA version, remove workaround for a bug they fixed.