Merge branch 'feature/add_gitmodules' into 'master'

.gitmodules

Makefile

perxis-proto

perxis/clients/clients_pb2.py

perxis/clients/clients_pb2_grpc.py

perxis/collaborators/collaborators_pb2.py

perxis/collaborators/collaborators_pb2_grpc.py

perxis/collections/collections_pb2.py

perxis/collections/collections_pb2_grpc.py

perxis/common/common_pb2.py

perxis/common/common_pb2_grpc.py

perxis/delivery/delivery_pb2.py

perxis/delivery/delivery_pb2_grpc.py

perxis/environments/environments_pb2.py

perxis/environments/environments_pb2_grpc.py

perxis/extensions/extension_pb2.py

perxis/extensions/extension_pb2_grpc.py

perxis/extensions/manager_pb2.py

perxis/extensions/manager_pb2_grpc.py

perxis/files/files_pb2.py