Fix lldiv error in windows cgminer_t calculation.
Use windows' own higher resolution time and handlers allowing us to have higher precision absolute timeouts.
Merge branch 'master' of github.com:ckolivas/cgminer
Add usb command name to critical libusb error reporting.
Implement a mutex_destroy function.
Implement a rwlock_destroy function.
Implement a cglock_destroy function.
Convert opencl to need to be explicitly enabled during build with --enable-opencl
Modify Makefile to only include opencl related code when configured in.
Enable dynamic linking against system libusb --with-system-libusb
Minor opencl build corrections.
Avoid entering static libusb directory if --with-system-libusb is enabled.
klondike - error condition handling