- reorganize the repo structure

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/subplex@29 edb9625f-4e0d-4859-8d74-9fd3b1da38cb
- finish reorganization


git-svn-id: svn://svn.r-forge.r-project.org/svnroot/subplex@30 edb9625f-4e0d-4859-8d74-9fd3b1da38cb
- fix Makefile

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/subplex@31 edb9625f-4e0d-4859-8d74-9fd3b1da38cb