Add Pins for Displays to Board Definitions

[brentru]

For boards with a display, the pinout and "pretty names" for the pins controlling the SPI display (Cs, miso/mosi, etc) should be added.

Doing this will let IO Web automatically associate the form name with the pin name.

This impacts the following board(s):

• FunHouse
• MagTag
• TFT Feathers
• Reverse TFT Feathers

[tyeth]

Closed by #215