Implemented deplomyent pipeline in python
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new file: deployment/__init__.py
new file: deployment/__main__.py
new file: deployment/core/__init__.py
new file: deployment/core/bootstrap.py
new file: deployment/core/suite.py
new file: deployment/core/task_runner.py
new file: deployment/core/tasks.py
new file: deployment/core/tests.py
new file: deployment/lib/__init__.py
new file: deployment/lib/errors.py
new file: deployment/lib/printer.py
new file: deployment/lib/task_types.py
new file: deployment/lib/types.py
new file: deployment/main.py
new file: deployment/prototype.py
modified: shell.nix
