added the TFT display library

libraries/TFT/examples/Esplora/EsploraTFTGraph/EsploraTFTGraph.ino

@@ -0,0 +1,56 @@
+/*
+
+ Esplora TFT Graph
+ 
+ This example for the Esplora with an Arduino TFT reads 
+ the value of the light sensor, and graphs the values on
+ the screen.
+ 
+ This example code is in the public domain.
+ 
+ Created 15 April 2013 by Scott Fitzgerald
+ 
+ http://arduino.cc/en/Tutorial/EsploraTFTGraph
+ 
+ */
+
+#include <Esplora.h>
+#include <TFT.h>  // Arduino LCD library
+#include <SPI.h>
+
+// position of the line on screen
+int xPos = 0;
+
+void setup(){
+
+  // initialize the screen
+  EsploraTFT.begin();
+
+  // clear the screen with a nice color
+  EsploraTFT.background(250,16,200); 
+}
+
+void loop(){
+
+  // read the sensor value
+  int sensor = Esplora.readLightSensor();
+  // map the sensor value to the height of the screen
+  int graphHeight = map(sensor,0,1023,0,EsploraTFT.height());
+
+  // draw the line in a pretty color
+  EsploraTFT.stroke(250,180,10);
+  EsploraTFT.line(xPos, EsploraTFT.height() - graphHeight, xPos, EsploraTFT.height());
+
+  // if the graph reaches the edge of the screen
+  // erase it and start over from the other side
+  if (xPos >= 160) {
+    xPos = 0;
+    EsploraTFT.background(250,16,200); 
+  } 
+  else {
+    // increment the horizontal position:
+    xPos++;
+  }
+
+  delay(16);
+}