0.02_01 2008-07-30
    - deployment at connect time is disabled by default, set journal_auto_deploy to reenable
    - $main_schema->deploy deploys the journalling tables too
    - support multi column primary keys
    - rename Change to ChangeLog to avoid conflict with mysql reserved word
    - fix schema composition when sharing connection
    - support for nested transactions (produce one changeset, but support stubs
      for nested changesets in place)
    - removed dummy table
    - various other cleanups
    - calling current_changeset outside of txn_do is fatal
    - fix 'now()' default value, timestamp happens in perl space instead
    - also call txn_do on the journal schema if the storage object differs
    - don't call txn_begin twice

0.01 2007-08-11:
Initial version