Bugfix: Use add_serial function for scan_serial, so that "all" keyword works correctly
TUI: Support for adding new devices using the plus key from [M]anage devices
Bugfix: Avoid crash activating [M]anage devices with no currently defined devices
cpu & opencl: Defer RUNONCE to actual autodetection, so they can be added once after startup
Merge commit '4c03acc' into bfgminer
Bugfix: Clear device bad nonces when zeroing stats
Merge commit '471d52c' into bfgminer
bitforce: Save voltages as array of longs internally
bitforce: Make voltages available to RPC