demos: simplify layers def for demo (features are pre-sorted on server, or can use style.order parameter)
demos: simplify layers def for demo (features are pre-sorted on server, or can use style.order parameter)

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