+ DT[,c("a","b"),with=FALSE] now copies columns as before, in R>3.0.2.
+ write.table(DT) is still failing in R>3.0.2 after all (test runs when bit64 is require()-ed).

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/datatable@1179 edb9625f-4e0d-4859-8d74-9fd3b1da38cb