Add creadit to the end of quickstart.sh (#238)

quickstart.sh

@@ -323,5 +323,11 @@ make help
 
 echo "-------------------------------------------------------------------------------------"
 echo " Acknowledgments "
+echo " Generated vector tiles are produced work of OpenStreetMap data. "
+echo " Such tiles are reusable under CC-BY license granted by OpenMapTiles team: "
+echo "   https://github.com/openmaptiles/openmaptiles/#license "
+echo " Maps made with these vector tiles must display a visible credit: "
+echo "   © OpenMapTiles © OpenStreetMap contributors "
+echo " "
 echo " Thanks to all free, open source software developers and Open Data Contributors!    "
 echo "-------------------------------------------------------------------------------------"