Travis: install grunt to be globally available #444
Travis: install grunt to be globally available #444

kodujdlapolski/streetmix,CodeForBrazil/streetmix,CodeForBrazil/streetmix,CodeForBrazil/streetmix,magul/streetmix,macGRID-SRN/streetmix,codeforamerica/streetmix,codeforamerica/streetmix,codeforamerica/streetmix,macGRID-SRN/streetmix,kodujdlapolski/streetmix,kodujdlapolski/streetmix,magul/streetmix,macGRID-SRN/streetmix,magul/streetmix