Update travis failure output command (#81)
Update travis failure output command (#81)

The current solution is outdated from the time that we ran all our builds directly on the Travis machines. Now it's only the OS X machines where this is the case; for the others, we run inside docker.
BioDynaMo/biodynamo,BioDynaMo/biodynamo,BioDynaMo/biodynamo,BioDynaMo/biodynamo