fix bug: get_df_paths, now paths with just one point, meaning zero length, will be remove when spliting the swc data into paths. code for calculating Strahler order is back.
fix bug: get_df_paths, now paths with just one point, meaning zero length, will be remove when spliting the swc data into paths. code for calculating Strahler order is back.

huangziwei/MorphoPy