Add OpenRailwayMap (#630)

* Add OpenRailwayMap

* Add OpenRailwayMap using JOSM extract script

Co-authored-by: Norbert Renner <norbert.renner@gmx.de>

layers/config/overrides.js

@@ -216,6 +216,10 @@ BR.confLayers.getPropertyOverrides = function() {
             'nameShort': 'MTB',
             'mapUrl': 'http://mtb.waymarkedtrails.org/#?map={zoom}!{lat}!{lon}'
         },
+        'openrailwaymap': {
+            'name': 'OpenRailwayMap',
+            'mapUrl': 'https://www.openrailwaymap.org/?style=standard&lat={lat}&lon={lon}&zoom={zoom}' 
+        },
         'mapillary-coverage': {
             'nameShort': 'Mapillary',
             'mapUrl': 'https://www.mapillary.com/app/?lat={lat}&lng={lon}&z={zoom}&menu=false'

layers/config/tree.js

@@ -72,6 +72,7 @@ BR.confLayers.tree = {
             'Waymarked_Trails-Cycling',
             'Waymarked_Trails-Hiking',
             'Waymarked_Trails-MTB',
+            'openrailwaymap',
             'mapillary-coverage',
             'osm-notes'
         ],