MySQL/Galera 0.8pre released

Written for MySQL patches by Codership by Alex Yurchenko on 2011-03-31

This is a preview release of the upcoming 0.8 series which is delayed due to writeset format refactoring. It is fully representative of features and performance of the upcoming 0.8 and should be used for evaluations. 0.8 series is a result of 1.5 years of refactoring based on our experience with 0.7 and represents a well overhauled Galera, with respect to both performance and features.