Merge branch '1.5.x' into 'master'

.gitignore

.gitlab-ci.yml

MANIFEST.in

README.rst

beat/__init__.py

beat/backend/__init__.py

beat/backend/python/__init__.py

beat/backend/python/algorithm.py

beat/backend/python/baseformat.py

beat/backend/python/data.py

beat/backend/python/data_loaders.py

beat/backend/python/database.py

beat/backend/python/dataformat.py

beat/backend/python/dbexecution.py

beat/backend/python/executor.py

beat/backend/python/hash.py

beat/backend/python/helpers.py

beat/backend/python/inputs.py

beat/backend/python/library.py

beat/backend/python/loader.py