Remove bitfury devices from the usb list on shutdown in case they have stopped responding but have not had a fatal usb error.
ANU frequency is in MHz, not hex.
Allow running cgminer in benchmark mode with a work file --benchfile
format fix and bad variable usage fix for --benchfile
Merge pull request #546 from kanoi/master

Allow running cgminer in benchmark mode with a work file --benchfile
Merge branch 'master' of https://github.com/ckolivas/cgminer
Merge branch 'master' of https://github.com/aspectron/cgminer
Get and set clock for HFA now by device pointer instead of index