add plant_nursery as shrubs and comment on nature_reserce

osmlookups/vegetation.py

@@ -61,5 +61,7 @@ OSM_VEGETATION_GUI = {
     "grave_yard": 3,
     "pitch": 3,
     "wetland": 14,
-    "greenfield": 3
+    "greenfield": 3,
+    "plant_nursery": 15 #,
+#    "nature_reserve": 14
 }