Add one check to ensure the grid point has all NAs or no NA along time dim....

• s2dverification!164 (closed): Add arguments lab_dist_x and lab_dist_y
• s2dverification#212 (closed) and s2dverification#213 (closed): EOF(): Add one check to ensure the grid point has all NAs or no NA along time dim. Refine the documentation.
• #36 (closed): Add filled.ocean feature
• PlotEquiMap(): Refine the mask code. The behaviors of [0, 360] and [-180, 180] are more consistent now.