major commit. group home page is now powered by a View (as in Views.module)....

major commit. group home page is now powered by a View (as in Views.module). Views and Views_RSS modules are now required. A 'river of news' View is included, but 'Group by Content Type' is not (yet). Admins can now make own View to customize to taste. Soon, a group manager will choose own View ... No database change, so little risk in trying this out.