ShutterSlap v4.0.1

Stable release with Oled & Led support for layer indicator

rewrite the whole code!

ShutterSlap v2.0.3

use Vial to configure!

use Flip version if your encoder turn the wrong way around.

Shutter v1.0.1

matrix layout:
------ row pin: 16, 10.
-- column pin: 5, 6, 7, 8, 9.

encoder: 15, 14.

optional:
encoder 2: A1. A0.
encoder 3: A3, A2.

oled: SDA (2) / SCL (3)

ShutterSlap v1.0

Update README.md