LC0 client and blog

[Hai]

Use now the new v0.21.1 !!!
FPU can now be independently controlled at root vs in general using the new AtRoot variants. Default value for StrategyAtRoot is 'same' which means it uses the values from the normal parameters. The reduction parameter has been removed - strategy reduction now uses the value parameter as the reduction amount.
TempVisitOffset option now allows you to specify values less than -1, and its documentation has been fixed.
A small performance improvement in movegen.
Windows packages should include v22 of the Client.
https://github.com/LeelaChessZero/lc0/releases

Also note:
2019-03-21
and
2019-03-18
https://blog.lczero.org/