XX PhIP RPackage

• We should revisit the use of Announcements to keep RPackage in sync. -- I would like to see if a class cannot have a direct reference to it package and we can have a NullPackage.
• Remove Class Categories
• RPackage tags are dog slow. Try to browse Bloc to see what I mean.
• The internal logic of RPackage has been messed up with method categories. While the goal was to avoid using method categories, we ended up with a huge mess. The logic is utterly cumbersome. RPackage should have nothing to do with method categories.