rebase to master branch

bower.json

@@ -20,7 +20,9 @@
     "Leaflet.EasyButton": "*",
     "bootbox": "~4.4.0",
     "seiyria-bootstrap-slider": "~4.8.1",
-    "url-search-params": "~0.5.0"
+    "url-search-params": "~0.5.0",
+    "Leaflet.RestoreView": "makinacorpus/Leaflet.RestoreView#master",
+    "leaflet.locatecontrol": "^0.52.0"
   },
   "overrides": {
     "leaflet": {
@@ -79,6 +81,9 @@
     },
     "url-search-params": {
       "main": "build/url-search-params.js"
+    },
+    "Leaflet.RestoreView": {
+      "main": "leaflet.restoreview.js"
     }
   },
   "resolutions": {

js/index.js

@@ -78,6 +78,9 @@
             zoom: 6,
             worldCopyJump: true
         });
+        if (!map.restoreView()) {
+          map.setView([50.99, 9.86], 6);
+        }
         map.attributionControl.addAttribution(
                 '<a href="http://brouter.de/brouter" target="_blank">BRouter</a> &copy; Arndt Brenschede, '
                 + 'routing + map data &copy; <a target="_blank" href="http://www.openstreetmap.org/copyright">OpenStreetMap</a> contributors '
@@ -145,6 +148,11 @@
         // left sidebar as additional control position
         map._controlCorners[leftPaneId] = L.DomUtil.create('div', 'leaflet-' + leftPaneId, map._controlContainer);
 
+        L.control.locate({
+            icon: 'glyphicon glyphicon-screenshot',
+            iconLoading: 'glyphicon glyphicon-refresh',
+        }).addTo(map);
+
         document.getElementById('about_link').onclick = function() {
             bootbox.alert({
                 title: 'About',