5.4.9 (2013-09-12)
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 * keep only the latest index files saved by recent repozo

5.4.8 (2012-07-31)
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 * drop base_url parameter [Romain Courteaud]
 * add missing __init_.py files [Romain Courteaud]

5.4.7 (2012-07-30)
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 * drop circular dependency with Zope [Romain Courteaud]
 * <product-config tidstorage> section is supported in zope.conf [Łukasz Nowak]
 * write always pidfile, even if not forking [Łukasz Nowak]
