Merge pull request #115 from OceanVision/ocean_don_corleone

Ocean don corleone
Merge pull request #117 from OceanVision/ocean_don_corleone

Fixed non-passing test_4.py
Added get_node_id
Merge branch 'ocean_don_corleone' of https://github.com/bziiuj/ocean into ocean_don_corleone