added y-distance comp peak/valley

[anastassiavybornova]

added the y-diff computation as discussed, and re-ran all result computation and plotting

[martinfleis]

Is it fair to say that results[city][option]["y_heights"] always has a list of ['left', 'right', 'valley'] so we can use it to measure both y distances? Not just the max as you do now. I would like to have 'y_diff_left' and 'y_diff_right' so we can report both.

[anastassiavybornova]

@martinfleis does that work if i continue adding stuff to this branch (within the 04x peaks notebooks) and we merge it later?

[martinfleis]

Yeah

[anastassiavybornova]

@martinfleis ready to be merged!