Rolled back to initial realized package and fixed the bugs to make it work.

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/realized@20 edb9625f-4e0d-4859-8d74-9fd3b1da38cb
Redo directory structure so that it will actually be built.

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/realized@21 edb9625f-4e0d-4859-8d74-9fd3b1da38cb
more of the same.

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/realized@22 edb9625f-4e0d-4859-8d74-9fd3b1da38cb