add a tile source for Mapbox-style vector tiles served from Mapzen dev server
add a tile source for Mapbox-style vector tiles served from Mapzen dev server

taylorhxu/tangram,ceseale/tangram,ceseale/tangram,taylorhxu/tangram,zerebubuth/tangram,taylorhxu/tangram,rosamcgee/tangram,zerebubuth/tangram,ceseale/tangram,xvilan/tangram,rosamcgee/tangram,DHaylock/tangram,TitoAgudelo/tangram,zerebubuth/tangram,tangrams/tangram,xvilan/tangram,DHaylock/tangram,TitoAgudelo/tangram,TitoAgudelo/tangram,rosamcgee/tangram,tangrams/tangram,xvilan/tangram,DHaylock/tangram