datatools.py no change simple lineshifts. gridtools.py added equal_vectors(data,region,spacing) returns the idx of elements spaced approx. by the given spacing. plot_maxs.py plots max ebb fld vectors and max speed. interp_zeta_level.py interpolates u and v to a given height and plots the same plots and plot_maxs.py. regions.py added some regions that were needed for plotting.