Adding support for Cheap Yellow Display

[witnessmenow]

• Adding support for non standard SPI pins and displays where reset is not connected
• Adding support for Nintendo Wii Nunchucks, including some documentation for it
• Added support for using GPIO26 for audio
• Adding a config option for the CYD and some documentation for it
• Adding conv_win.sh, a conversion script that works on Windows with powershell

If there is anything that you would like changed, please let me know!