Specify package name when loading data, to avoid clashes with other packages, and re-indent.

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/r2mlwin@262 edb9625f-4e0d-4859-8d74-9fd3b1da38cb
Load packages after installing if they are missing.

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/r2mlwin@263 edb9625f-4e0d-4859-8d74-9fd3b1da38cb