implement a first scheduling for manager, add config files in manager and server

brender/dashboard/controllers/jobs.py

brender/dashboard/controllers/projects.py

brender/manager/application/__init__.py

brender/manager/application/config.py.example

brender/manager/application/modules/tasks/__init__.py

brender/manager/application/modules/tasks/model.py

brender/manager/application/modules/workers/__init__.py

brender/manager/manage.py

brender/server/application/__init__.py

brender/server/application/config.py.example

brender/server/application/modules/tasks/__init__.py

brender/server/application/modules/tasks/model.py

brender/server/application/modules/workers/__init__.py

brender/server/application/utils.py

brender/worker/controllers.py