ROO-3288 fix

Sorry Alan, I managed to muddle up the commit missing a rather crucial part. This is the fix for pull request #64. I have also run deployment-support/roo-ci.sh -dvt which succeeds in building all addons and also the deployment support module. It fails as follows as I don't have sha tools on this mac. I'm not sure how much more there is to run. 

Command........: assembly
### ERROR: sha1sum not found. Aborting.
### ERROR: roo-deploy -c assembly failed (exit code 1).