USB device list - convert some common error numbers to messages
nDevs required for -n with usb
add a dummy ztex to usbutils so cgminer -n lists ztex also
Update the hashmeter once per second but only display the extra logs every opt_log_inteval.
Merge branch 'master' of github.com:ckolivas/cgminer
Merge pull request #406 from kanoi/bflsc

USB device list - convert some common error numbers to messages + nDevs required for -n with usb
bufsize is an unsigned integer, make it so for debug.
Remove the rounding-up of the scrypt padbuffer which was not effectual and counter-productive on devices with lots of ram, limiting thread concurrencies and intensities.
Do not round up the bufsize to the maximum allocable with scrypt.
Use a new algorithm for choosing a thread concurrency when none or no shader value is specified for scrypt.
Connect backup stratum pools if the primary pool cannot deliver work.
Set default GPU threads to 1 for scrypt.