update README.md
update README.md

haoliangyu/angular2-leaflet-starter,haoliangyu/angular2-leaflet-starter,dkocich/osm-pt-ngx-leaflet,troddick/SiGL_Mapper,troddick/SiGL_Mapper,haoliangyu/angular2-leaflet-starter,dkocich/osm-pt-ngx-leaflet,dkocich/osm-pt-ngx-leaflet,troddick/SiGL_Mapper