Test environments

local: Windows X, R 3.6
travis-ci: Ubuntu 14.04.5, R 3.2.5, 3.3.3, 3.4.4, old (3.5.3), release (3.6.0), devel
RHub:
- Windows Server 2008 R2 SP1, R-devel, 32/64 bit
- Ubuntu Linux 16.04 LTS, R-release, GCC
- Fedora Linux, R-devel, clang, gfortran
win-builder: old, release, devel

R CMD check results

There were no ERRORs, WARNINGs or NOTEs.

No ERRORs or WARNINGs found.