Merge branch 'release-3.1.0'

.gitignore

CHANGELOG.txt

CMakeLists.txt

doc/source/conf.py

doc/source/example_scripts/cbeta_potential_example.py

doc/source/example_scripts/container_example.py

doc/source/example_scripts/disco_example.py

doc/source/example_scripts/interaction_potential_example.py

doc/source/getting_started.rst

doc/source/run_qmean_scoring.rst

pymod/__init__.py

pymod/export_reduced.cc

pymod/mqa_membrane.py

pymod/mqa_result.py

pymod/mqa_result_membrane.py

pymod/wrap_qmean.cc

scripts/bump-version.py

src/CMakeLists.txt

src/disco.cc

src/impl/cbeta_impl.cc