Fix travis build (Fixes #594)
Fix travis build (Fixes #594)

DanielNeugebauer/adhocracy,phihag/adhocracy,alkadis/vcv,alkadis/vcv,DanielNeugebauer/adhocracy,alkadis/vcv,DanielNeugebauer/adhocracy,liqd/adhocracy,liqd/adhocracy,DanielNeugebauer/adhocracy,phihag/adhocracy,phihag/adhocracy,phihag/adhocracy,alkadis/vcv,phihag/adhocracy,liqd/adhocracy,liqd/adhocracy,DanielNeugebauer/adhocracy,alkadis/vcv