* Fix bug where UserCrontabs with empty readcrontab and writecrontab constructor arguments where broken
0.3
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* Renamed to z3c.recipe.usercrontab * Add an option to change the command used to read and write crontabs * Improved tests to not modify the real crontab
0.2
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* Warn if an entry cannot be removed in buildout uninstall * Break if multiple entries would be removed in buildout uninstall * Have del_entry return the number of removed