References
http://elinux.org/Rpi_Low-level_peripherals#General_Purpose_Input.2FOutput_.28GPIO.29
http://binerry.de/post/25787954149/pcd8544-library-for-raspberry-pi
http://www.avdweb.nl/arduino/hardware-interfacing/nokia-5110-lcd.html
http://www.raspberrypi.org/phpBB3/viewtopic.php?f=32&t=9814&start=100
http://www.henningkarlsen.com/electronics/t_imageconverter_mono.php
http://www.sitronix.com.tw/sitronix/product.nsf/Doc/ST7735?OpenDocument
http://www.raspberrypi.org/phpBB3/viewtopic.php?t=28696&p=262909
http://elinux.org/images/1/19/Passing_Time_With_SPI_Framebuffer_Driver.pdf
http://harizanov.com/product/1-8-tft-display-for-raspberry-pi/