The install instructions for Overlord-CDL-M2 have been updated to include an additional step. This is because the release is dependent upon a 'technical preview' plugin within the pi4soa project, which has subsequently been moved into the Overlord-CDL trunk.
The reason for the move is to overcome project release schedule incompatibilities. The functionality within this plugin needs to be more aligned with the Overlord CDL releases. Therefore to avoid future plugin conflicts, the M2 dependent plugin has been separated out from the main pi4soa distribution.
The additional plugin can now be obtained from the update site: http://pi4soa.sourceforge.net/updates-tp
Sorry for any inconvenience that this will cause.