Fix share diff and randomize start nonce

v2.8.3

fix nonce and share min target

Fix hashing bugs

v2.8.2

fix bugs

Add support for YadaCoin on stratum protocol

v2.8.1

add support for yadacoin

v2.8.0 Release Candidate 2

This release candidate fixes a bug which caused the miner to repeatedly request jobs even before previous jobs were complete.

2.8.0RC1

This is the first release candidate for the yada/xmrig integration. Please help test so we can promote to official release.