logo size configurable
refactor - list comprehension is done only once now
removed strange "else:"
Serial is now never off
This seemes to solve problems with boards sometimes misinterpreting data after not listening serial.
(only when writing we don't listen, we assume no-one else is writing data at the same time - i would be garbage anyways).

boards could be used to monitor collisions on bus if they would also listen what they send.
Skip refresh, when board is already displaying the same data
Automatic code format
removed old warning
.
cleanup
Debug sequence (R,G,B,W) only triggers if pin 12 is pulled low
Only upper-left LED for indication
Request Info works
Fixed initial board enumeration:
reset board sequence numbers on initialisation.
reset next sequence number on ID-reset
updated version numbers
Removed debug timing info
improved colors
bugfix - random path was seen on first press
Pong now works with any board size
protected controller with a flag from invalid start/stop (webserver could call "start" multiple times)
games are reset after power on/off cycle
Now skipping boards that don't need updating