Plone-scale

----------------

- Update package metadata.
[hannosch]

----------------

- Abort if thumbnail behaviour is requested but either width or height is
missing. This is nicer than confronting the caller with a PIL exception.
[wichert]

- Rename the `keep` direction to `thumbnail` to make its behaviour more
intuitive, but accept `keep` for now.
[wichert]

----------------

- Only pull in the uuid distribution in Python versions before 2.5.
[hannosch]

- Don't declare dependency on PIL.
[davisagli]

------------------

- Add BSD license text following board decision:
http://lists.plone.org/pipermail/membership/2009-August/001038.html
[elro]

- Allow to use PIL's thumbnail algorithm to keep the present aspect ratio.
[spamsch, witsch]

- Allow to set the quality of the resulting image scales.
[witsch]

- Refactor storage adapter for image scales to be less dependent on the
underlying content type.
[witsch]

------------------

- Initial release
[wichert]