adjust timing math, fix i0 constant
Fixes for continuous mode
duty is a decimal representation of duty cycle
increase current setpoint, disable M1K output channels on end of sweep
add ctrl_transfer abstraction to Device base class
Merge pull request #4 from signalspec/repl

add ctrl_transfer abstraction to Device base class
Windows doesn't have M_PI
Eliminate nonportable endian.h functions
Include LIBUSB_CALL attribute with all mentions of function