update copyright

COPYING

Makefile

include/arch.h

include/arch/arduino-nano/arch_types.h

include/arch/arduino-nano/driver/adc.h

include/arch/arduino-nano/driver/counter.h

include/arch/arduino-nano/driver/dmx.h

include/arch/arduino-nano/driver/gpio.h

include/arch/arduino-nano/driver/i2c.h

include/arch/arduino-nano/driver/spi.h

include/arch/arduino-nano/driver/stdin.h

include/arch/arduino-nano/driver/stdout.h

include/arch/arduino-nano/driver/timer.h

include/arch/arduino-nano/driver/uptime.h

include/arch/atmega2560/arch_types.h

include/arch/atmega2560/driver/counter.h

include/arch/atmega2560/driver/dmx.h

include/arch/atmega2560/driver/gpio.h

include/arch/atmega2560/driver/stdin.h

include/arch/atmega2560/driver/stdout.h