Improve example to adjust to latest Application changes

An ofxPiMapper::update() method was added.

example/src/ofApp.cpp

@@ -23,6 +23,10 @@ void ofApp::setup(){
 	ofSetFullscreen(Settings::instance()->getFullscreen());
 }
 
+void ofApp::update(){
+	piMapper.update();
+}
+
 void ofApp::draw(){
 	piMapper.draw();
 }

example/src/ofApp.h

@@ -10,6 +10,7 @@
 class ofApp : public ofBaseApp {
 	public:
 		void setup();
+		void update();
 		void draw();
 
 		ofxPiMapper piMapper;