added Vertical Slider example

examples/MicroViewVSlider/MicroViewVSlider.ino

@@ -0,0 +1,47 @@
+#include <MicroView.h>
+
+int buttonPin = A0;     // push button pin
+int buttonState = 0;	// variable for reading the pushbutton status
+int onCount = 0;
+MicroViewWidget *hWidget, *vWidget1, *vWidget2;
+
+void setup() {
+	uView.begin();
+	uView.clear(PAGE);
+	
+	// initialize the pushbutton pin as an input:
+	pinMode(buttonPin, INPUT);  
+	digitalWrite(buttonPin,HIGH);  
+	
+	//Create a slider to count how long the switch is on
+//	hWidget = new MicroViewSlider(0, 0, 0, 99, WIDGETSTYLE0);
+	vWidget1 = new MicroViewSlider(0, 0, 0, 255, WIDGETSTYLE2);
+	vWidget2 = new MicroViewSlider(31, 0, 0, 255, WIDGETSTYLE3);
+}
+
+void loop() {
+	// read the state of the pushbutton value:
+	buttonState = digitalRead(buttonPin);
+
+	// check if the pushbutton is pressed.
+	// if it is not pressed, the buttonState is HIGH:
+	if (buttonState == HIGH) {     
+		onCount = min(onCount+1, 255);
+//		hWidget->setValue(onCount);
+		vWidget1->setValue(onCount);
+		vWidget2->setValue(onCount);
+//		uView.setCursor(0,0);
+//		uView.print("OFF");
+		uView.display();
+ 	} 
+	else {
+		onCount = max(onCount-1, 0);
+//		hWidget->setValue(onCount);
+		vWidget1->setValue(onCount);
+		vWidget2->setValue(onCount);
+//		uView.setCursor(0,0);
+//		uView.print("ON ");
+		uView.display();
+  }
+}
+