This PR decouples namelist options pertaining to sloped ocean cases:
previously, slope_offset=true set initial isopycnals to be horizontal and implemented periodic offset according to initial scalar gradients
now, 'slope_offset = true' sets periodic offset and a new parameter slope_parallel_gradients determines whether initial isopycnals are parallel to the slope.
By default, slope_offset = false and slope_parallel_gradients = true
This PR decouples namelist options pertaining to sloped ocean cases: previously,
slope_offset=trueset initial isopycnals to be horizontal and implemented periodic offset according to initial scalar gradients now, 'slope_offset = true' sets periodic offset and a new parameterslope_parallel_gradientsdetermines whether initial isopycnals are parallel to the slope. By default,slope_offset = falseandslope_parallel_gradients = true