tsl2550: fix for sensor overflow returning -1 signifying error,
worked around by returning 5000, the max lux the sensor can return.
tsl2550: changed max-value-on-overlflow to 3000.
Rewritten USB raw support to transparently include atmel
devices over usb or i2c.
Re-add k8055 in new USBraw implementation.
Re-add elv usb i2c adapter + tmp275.
Merge branch 'master' of github.com:eriksl/iocd

Conflicts:
	device_tsl2550.cpp