add wiringpi to packages

setup.py

@@ -7,5 +7,5 @@ setup(name              = 'Adafruit_Video_Looper',
       description       = 'Application to turn your Raspberry Pi into a dedicated looping video playback device, good for art installations, information displays, or just playing cat videos all day.',
       license           = 'GNU GPLv2',
       url               = 'https://git.notice.at/redplanet/pi_video_looper_gpio.git',
-      install_requires  = ['pyudev'],
+      install_requires  = ['pyudev', 'wiringpi'],
       packages          = find_packages())