Add hwtest 0.1.0

This is a python utility for testing hardware:

pine-dontbeevil:~# hwtest
Category         Model                Path                                      Status     Value                     
framebuffer      DRM emulated         /sys/class/graphics/fb0                   working    Not running               
drm              -                    /sys/class/drm/card1-DSI-1                working    720x1440                  
camera           ov5640               /sys/class/video4linux/v4l-subdev0        working    320x240,640x480,1280x720  
magnetometer     lis3mdl              /sys/bus/iio/devices/iio:device2          working    -0.06, 0.35, 0.93 gauss   
accelerometer    mpu6050              /sys/bus/iio/devices/iio:device1          working    1.46, 0.17, -10.53 g      
gyroscope        mpu6050              /sys/bus/iio/devices/iio:device1          working    -0.05, -0.03, 0.04 rad/s  
temperature      mpu6050              /sys/bus/iio/devices/iio:device1          working    37 deg C                  
temperature      axp813-adc           /sys/bus/iio/devices/iio:device0          working    28500 deg C               
proximity        stk3310              /sys/bus/iio/devices/iio:device3          working    300.8                     
illuminance      stk3310              /sys/bus/iio/devices/iio:device3          working    397 lux                   
input            generic ft5x06 (12)  /dev/input/event2                         working                              
input            1c21800.lradc        /dev/input/event1                         working                              
input            axp20x-pek           /dev/input/event0                         working