Comments for submission to CRAN Test environments Ubuntu 14.04 (travis-ci) R 3.3.2 R devel Mac OSX 10.9.5 (travis-ci R 3.3.2 R devel Windows Server 2012 R2 (x64) (appveyor) R 3.3.2 Windows Server 2008 (x64) (win-builder) R 3.4.0 R CMD check results