+ Removed settruelength, no longer needed now we Depend on R 2.14.0 (which initializes tl to 0 rather than leaving it uninitialized).
+ paste0=>paste and backported provideDimnames() from R 3.0.0, to pass R2140 CMD check

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/datatable@1181 edb9625f-4e0d-4859-8d74-9fd3b1da38cb