Fix the diff value used on MM firmware
Enable the cutofftemp to Avalon2. ignore longer coinbase and longer merkles stratum
add avalon2-cutoff options
Fix the temp max. we should use currect max temp
Update default modules from 3 to 4
Automatic detect the small miners
Minor changes
Merge pull request #597 from BitSyncom/rebase

More features added on Avalon2/3 driver