Open project now implemented.

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/mastermix@41 edb9625f-4e0d-4859-8d74-9fd3b1da38cb
Easier to load files.

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/mastermix@42 edb9625f-4e0d-4859-8d74-9fd3b1da38cb