bumped back accidental c++17 requirement to c++14 [skip travis]
bumped back accidental c++17 requirement to c++14 [skip travis]

gitesei/faunus,bjornstenqvist/faunus,bjornstenqvist/faunus,gitesei/faunus,gitesei/faunus,mlund/faunus,bjornstenqvist/faunus,mlund/faunus,mlund/faunus