- extracted from populate_recent_changes, the recent_changes_sources that enables to filter early.
Added author_name to the CMS_RECENT_CHANGE_ITEM to support author which is not related to any CMS_USER.
Implemented the simple filtering on source and add parameters size and date.
Revisited hooks management, and added new CMS_HOOK_MANAGER.
Added admin, and other link into navigation menu that goes into first sidebar.
Fixed theme info, and template for sidebar ids.
Better css class name for cms node content.
