first .osm format import

- import osm convert it to Drawing and use it as resolved path.
- Not ready , first test over lab/valbonne_oct_2020.osm

java/org/artisanlogiciel/osm/NodeRef.java

@@ -0,0 +1,37 @@
+package org.artisanlogiciel.osm;
+
+public class NodeRef {
+    long id;
+    Node node;
+
+    public NodeRef(long id) {
+        this.id = id;
+    }
+
+    public void setNode(Node node) {
+        this.node = node;
+    }
+
+    public Node getNode()
+    {
+        return node;
+    }
+
+    public String toString()
+    {
+        return node != null ? node.toString(): "nd:" + id;
+    }
+
+    @Override
+    public int hashCode() {
+        return Long.hashCode(id);
+    }
+
+    @Override
+    public boolean equals(Object o) {
+        if ( o instanceof NodeRef ) {
+            return ((NodeRef) o).id == id;
+        }
+        return false;
+    }
+}