Parallela16 temperature

Reading the temperature for the Xilinx Zynq chip is done as described in http://forums.parallella.org/viewtopic.php?t=930

with

python -c "T=open('/sys/bus/iio/devices/iio:device0/in_temp0_raw').read(); T = (float(T) / 4096. * 503.975) - 273.15; print T"