Bump modelling module to (c) 2020

NOTICE

modelling/doc/algorithms.rst

modelling/doc/gap_handling.rst

modelling/doc/index.rst

modelling/doc/loop_candidates.rst

modelling/doc/loop_closing.rst

modelling/doc/model_checking.rst

modelling/doc/monte_carlo.rst

modelling/doc/pipeline.rst

modelling/doc/sidechain_reconstruction.rst

modelling/pymod/__init__.py

modelling/pymod/_closegaps.py

modelling/pymod/_denovo.py

modelling/pymod/_fragger_handle.py

modelling/pymod/_mhandle_helper.py

modelling/pymod/_molprobity.py

modelling/pymod/_monte_carlo.py

modelling/pymod/_pipeline.py

modelling/pymod/_reconstruct_sidechains.py

modelling/pymod/_ring_punches.py