Implemented Scratch-link[1] feature as a small python script. Confirmed
it is working with Scratch 3.0[2] using a micro:bit as the BLE device to
link. This allows Linux PCs to connect Scratch and micro:bit.
Utilized bluez[3] and bluepy[4] to handle Bluetooth Low Energy connection.
Utilized Websocket module for Secure Web Socket server.
[1] https://github.com/LLK/scratch-link
[2] https://scratch.mit.edu/
[3] http://www.bluez.org/
[4] https://github.com/IanHarvey/bluepy
This is a minimal implementation to support micro:bit. Some of
Scratch-link features are not implemented. For example, Bluetooth (not
BLE) devices are not supported. BLE device support is confirmed only with
micro:bit.
Signed-off-by: Shin'ichiro Kawasaki <kawasaki@juno.dti.ne.jp>
