Return residuals as a list of vectors. This allows them to be different lengths at each level.

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/r2mlwin@283 edb9625f-4e0d-4859-8d74-9fd3b1da38cb
Detect whether the R version is 64bit in the same way as runMLwiN.

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/r2mlwin@284 edb9625f-4e0d-4859-8d74-9fd3b1da38cb