Add Pinky4

[Soundtoxin]

Please complete this checklist and submit your issue - I will do my best to add your keyboard as soon as I can:

• Keyboard name: Pinky4
• Url to vector graphic (e.g. svg, pdf, etc.) of switch plate: https://github.com/tamanishi/Pinky4/blob/master/top-plate/Pinky4-top-plate.png (not an svg, I know, consider it a placeholder until someone finds/makes one)
• Min and max number of keys: 64
• Url to keyboard project source (if available): https://github.com/tamanishi/Pinky4
• Url to store to buy keyboard (if available): https://www.littlekeyboards.com/products/pinky4-keyboard-kit

There is also a similar Pinky3 keyboard

[Soundtoxin]

Whoops, somehow I missed #18 when searching issues, then noticed it listed under the todo issue. Will close this as a dupe then.