5.1 alpha with Partitioning released

Now the first alpha release of partitioning has been released.
This includes more or less all the syntax for partitioning to be
available. There is still some optimisation patches that are in the
works for coming 5.1 alpha releases.

There is still a small window of opportunity to get smaller additions
in so please use the MySQL partitioning forum to feedback any ideas
you have on improvements.

Partitioning is designed to work with all storage engines of MySQL. It is
however not possible to mix storage engines in a table. It is also possible
to use partitioning for MySQL Cluster. This gives the DBA the possibility to
control data placement in the cluster and thus create heterogenous clusters.

Most of the documentation for partitioning is already written and can be found
in the MySQL 5.1 Reference Manual due to some hard work by Jon Stephens.
Suggestions for improvements is welcome here as well.