Merge branch 'docker' into 'master'

.gitlab-ci.yml

README.rst

beat/core/agent.py

beat/core/algorithm.py

beat/core/async.py

beat/core/dock.py

beat/core/execution.py

beat/core/hash.py

beat/core/sandboxer.py

beat/core/schema/common/1.json

beat/core/stats.py

beat/core/test/cpu_stress.py

...core/test/prefix/algorithms/user/cxx_integers_echo/1.json

...t/prefix/algorithms/user/cxx_integers_echo/CMakeLists.txt

...st/prefix/algorithms/user/cxx_integers_echo/algorithm.cpp

...test/prefix/algorithms/user/cxx_integers_echo/algorithm.h

...t/prefix/algorithms/user/cxx_integers_echo/beat_setup.cpp

...est/prefix/algorithms/user/cxx_integers_echo/beat_setup.h

...gorithms/user/cxx_integers_echo/user_single_integer_1.cpp

...algorithms/user/cxx_integers_echo/user_single_integer_1.h