New light sensor code seems to be working.
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# Changes to be committed:
#	modified:   light.c
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# Untracked files:
#	../applications/command-line-rpi/sn-util-rpi
#	../avr-libc rebuild newer version/
#	../avr-libc rebuild/avr8-gnu-toolchain-3.5.3.1700-linux.any.x86_64.tar.gz
#	../avr-libc rebuild/avr8-gnu-toolchain-linux_x86_64/
#	../avr-libc rebuild/binutils-avr_2.24+Atmel3.4.4-1_amd64.deb
#	../avr-libc rebuild/gcc-avr_4.8.1+Atmel3.4.4-2_amd64.deb
#