Applying eelkeblok's patch in http://drupal.org/node/1880080#comment-7138126. Fixing menu index errors too.
Adjusting Zen dependency to use most stable release.
Updating core dependency to 7.20.
Fixing URL-related packaging issue.
Fixing typo in block region placement.
Updating RedHen Features.
Updating Make file with missing dependencies.
Updating Make file with most recent changes to dependencies and version recommendations.
Updating Drupal.org core make file to use the most recent Core release.
Add redhen activity module, dependent on Message.
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