Remove spatial referencing for short wvl layer

[sssangha]

And also make v1.1 default downloading the default

[braimbow]

Looks good to me! Old comments removed in recent commits have been added back.

[braimbow]

Actually, the importation from pst_ts_utils import calculate_cumulative_displacement is not accurate with this version. Here, the calculate_cumulative_displacement is in thepst_dolphin_utils.py code. So that we only have one utils file with the necessary codes. This is what's done in the previous version that we shared, just added the necessary function (i.e., only calculate_cumulative_displacement) to pst_dolphin_utils.py.
Will make a commit to the v11 branch with my modification if it's fine with you.