Added wrap longitude functions.
Cleaned unused functions and fix #34 `get_nearest_water`.
Added `slice_bbox_extract()`.
Return `series=None` if point is in land.
Major clean-up.  Using new grid logic to find all points.
Major clean-up.  Using new grid logic to find all points.
Latest run.
Merge pull request #35 from ocefpaf/fix_grid

Fix grid