Pillow test files.

Test scripts are named `test_xxx.py` and use the `unittest` module. A base class and helper functions can be found in `helper.py`.

Run the tests from the root of the Pillow source distribution:

    python selftest.py
    nosetests Tests/test_*.py

Or with coverage:

    coverage run --append --include=PIL/* selftest.py
    coverage run --append --include=PIL/* -m nose Tests/test_*.py
    coverage report
    coverage html
    open htmlcov/index.html

To run an individual test:

    python Tests/test_image.py