Version bump to 5.6.1

Version bump to 5.6.0

Merge pull request nicehash#7 from ivansib/master

Add sibcoin (X11-Gost) algo

Version bump to 5.5.0

Remove incompatible kernels

Version bump to 5.4.0

Merge pull request nicehash#5 from nicehash/develop

Blake algo + fixes

Merge pull request nicehash#4 from theLosers106/master

Upgrade to version 5.2.1