Build failures due to board.py exceeding maximum lines permitted by Pylint

[NathanY3G]

At the time of writing the board.py source file contains 990 lines. The maximum permitted by the project's Pylint configuration is 1000. Attempting to add support for a new board resulted in build failures.

One possible solution might be to refactor some of the if-elif constructs to use a dictionary instead.

[makermelissa]

Yeah, good idea. Another solution that could help would be to move a lot of the private id functions to another module and just import from there. That way it shouldn't break anything.

[NathanY3G]

That's a great idea @makermelissa. To check that I have understood your idea correctly I have created a draft PR #299. I have initially chosen a single but very common board to aid testing. I would be grateful if you could take a look.