Integration of the double-linked node list ParticleSet structure to 'master'

environment_py3_linux.yml

@@ -3,30 +3,33 @@ channels:
   - defaults
   - conda-forge
 dependencies:
-  - python>3.4
+  - python>=3.4
   - cachetools>=1.0.0
   - cgen
+  - gcc_linux-64
   - coverage
   - ffmpeg>=3.2.3
   - flake8>=2.1.0
   - git
-  - gcc_linux-64
   - mpi4py>=3.0.1
   - mpich>=3.2.1
   - jupyter
   - matplotlib>=2.0.2
   - netcdf4>=1.1.9
+  - hdf5>=1.10.6
   - numpy>=1.9.1
   - py>=1.4.27
   - pymbolic
   - python-dateutil
   - scipy>=0.16.0
-  - six >=1.10.0
+  - six>=1.10.0
   - tqdm
   - xarray>=0.10.8
-  - cftime>=1.3.1
+  - pandas>=0.19.2,<1.3.0
   - dask>=2.0
+  - cftime>=1.3.1
   - pytest
   - nbval
   - scikit-learn
   - pykdtree
+  - sortedcontainers>=2.1.0

environment_py3_osx.yml

@@ -16,6 +16,7 @@ dependencies:
   - jupyter
   - matplotlib>=2.0.2
   - netcdf4>=1.1.9
+  - hdf5>=1.10.6
   - numpy>=1.9.1
   - py>=1.4.27
   - pymbolic
@@ -24,9 +25,11 @@ dependencies:
   - six>=1.10.0
   - tqdm
   - xarray>=0.10.8
+  - pandas>=0.19.2,<1.3.0
   - dask>=2.0
   - cftime>=1.3.1
   - pytest
   - nbval
   - scikit-learn
   - pykdtree
+  - sortedcontainers>=2.1.0

environment_py3_win.yml

@@ -13,6 +13,7 @@ dependencies:
   - m2w64-toolchain
   - matplotlib>=2.0.2
   - netcdf4>=1.1.9
+  - hdf5>=1.10.6
   - numpy>=1.9.1
   - py>=1.4.27
   - pymbolic
@@ -27,3 +28,4 @@ dependencies:
   - pytest
   - nbval
   - pykdtree
+  - sortedcontainers>=2.2.2

parcels/__init__.py

@@ -17,3 +17,4 @@
 from parcels.gridset import *  # noqa
 from parcels.grid import *  # noqa
 from parcels.tools import *  # noqa
+from parcels.nodes import *  # noqa

parcels/collection/__init__.py

@@ -2,3 +2,4 @@
 from .iterators import *  # noqa: F401
 from .collectionaos import *  # noqa: F401
 from .collectionsoa import *  # noqa: F401
+from .collectionnodes import *  # noqa: F401