Fixes #360 : Material now serializes name

jme3-core/src/main/java/com/jme3/material/Material.java

@@ -1236,12 +1236,14 @@ public class Material implements CloneableSmartAsset, Cloneable, Savable {
         oc.write(def.getAssetName(), "material_def", null);
         oc.write(additionalState, "render_state", null);
         oc.write(transparent, "is_transparent", false);
+        oc.write(name, "name", null);
         oc.writeStringSavableMap(paramValues, "parameters", null);
     }
 
     public void read(JmeImporter im) throws IOException {
         InputCapsule ic = im.getCapsule(this);
 
+        name = ic.readString("name", null);
         additionalState = (RenderState) ic.readSavable("render_state", null);
         transparent = ic.readBoolean("is_transparent", false);