upgrade from 0.8-beta1 to 0.8

Hi team,

Currently we are using 0.8-beta1. We plan to upgrade to 0.8. My concern
is whether we need to purge all existing kafka and zookeeper data on the
hard drive for this upgrade. In other words, can 0.8 use 0.8-beta1 kafka
and zookeeper data on the hard drive? Thanks.

Regards,

Libo