Document changes in the doorlock blueprint

The doorlock code has been changes:

• changed to class implementation in C++
• added new input devices: coap, shell, keypad
• added dummy locks which require just Arduino Nano: led_doorlock and led_rot_doorlock, for testing purposes.

New sections ought to be documented.

CC: @brgl @lucaseri

changed title from Document changes in doorlock to Document changes in the doorlock blueprint

mentioned in merge request !9 (closed)

assigned to @mrfrank

mentioned in merge request !14 (merged)

mentioned in merge request !15 (merged)

mentioned in commit mrfrank/docs@e3e19375

@mrfrank can we close this issue related to doorlock docs?

closing

closed