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* Implemented a wrapper module around the standard argparse package, exposing the same interface with some extras on top, including a new builder type with expressive DSL for constructing complex argument parsers. * Fixed imports in build_swift/argparse/__init__.py to make flake8 happy. * More re-formmating to meet the exacting standards of the python_lint script. * Added doc-strings to all the modules in the build_swift argparse overlay. * Implemented a new BoolType for the argparse module which handles boolean-like values and replaces the hard-coded boolean values in the _ToggleAction class. * Fixed the mess of imports in the tests sub-package to favor relative imports, so now the unit-tests will actually run as expected. The README has also been updated with a better command for executing the unit-test suite. * Updated the add_positional method on the ArgumentParser builder class to only take a single action or default to the store action. * Cleaned up the set_defaults method. * Added validation test to run the build_swift unit-tests. * Updated validation-test for the build_swift unit-test suite to use %utils. * Fixed hard-coded default values in the expected_options module used for generating argument parser tests. * Updated the comment in the Python validation test to run the build_swift unit-tests.