Clang 3.5 and GCC 4.9 do not play nicely together
Clang 3.5 and GCC 4.9 do not play nicely together

See: https://bugs.debian.org/cgi-bin/bugreport.cgi?msg=11;bug=744872
So I will use clang-3.6 on Linux for Travis builds

Luthaf/Chemharp,Luthaf/Chemharp,lscalfi/chemfiles,chemfiles/chemfiles,Luthaf/Chemharp,chemfiles/chemfiles,chemfiles/chemfiles,lscalfi/chemfiles,lscalfi/chemfiles,lscalfi/chemfiles,chemfiles/chemfiles