Add defaultSurfaces.xml to avoid saved surface.xml conflicts when pulling new versions later

example/bin/.gitignore

@@ -1,3 +1,4 @@
 *.app
 data/*.jpg
 data/settings.xml
+data/surfaces.xml

example/src/ofApp.cpp

@@ -14,7 +14,14 @@ void ofApp::setup()
     surfaceManager.getSurface(1)->setVertex(2, ofVec2f(300, 400));
     */
     
-    surfaceManager.loadXmlSettings("surfaces.xml");
+    // check if the surfaces.xml file is there
+    // if not - load defaultSurfaces.xml
+    
+    if ( ofFile::doesFileExist("surfaces.xml") ) {
+        surfaceManager.loadXmlSettings("surfaces.xml");
+    } else {
+        surfaceManager.loadXmlSettings("defaultSurfaces.xml");
+    }
     
     gui.setSurfaceManager( &surfaceManager );
 }