Ftw.recipe.checkversions

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

- Nothing changed yet.

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

- Add support for "relative-paths" buildout option.
[jone]

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

- Show previous version as comment in proposed updates.
[jone]

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

- Add "index" option, so that pypi mirrors can be used.
[jone]

- Fix typo in readme in example, thanks mauritsvanrees for reporting.
[jone]

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

- Initial implementation.
[jone]