[feature] game field scaling

[quantenzitrone]

It would be neat, if one could configure for one unit to be n terminal rows and 2n terminal columns (n∈ℕ).
This would allow a zoomed snake game without having to zoom in the terminal application itself.

[AngelJumbo]

I thougth about this before but I like to be able to use all the options together and this option could not be used with the ascii mode for this same reason I have not implemented the Hamiltonian cycles algorithm since it could not be used with the junk option.
Even so, I have thought about rewriting everything I could include this feature there, I don't promise anything soon since I have been busy with work but maybe one weekend I could sit down and code somethig that is not javascript.