Changed all .pde examples to .ino

All examples in /build/shared/examples/ and /libraries/ have had their
extensions changed to .ino

build/shared/examples/4.Communication/MultiSerialMega/MultiSerialMega.ino

@@ -0,0 +1,33 @@
+/*
+  Mega multple serial test
+ 
+ Receives from the main serial port, sends to the others. 
+ Receives from serial port 1, sends to the main serial (Serial 0).
+ 
+ This example works only on the Arduino Mega
+ 
+ The circuit: 
+ * Any serial device attached to Serial port 1
+ * Serial monitor open on Serial port 0:
+ 
+ created 30 Dec. 2008
+ by Tom Igoe
+ 
+ This example code is in the public domain.
+ 
+ */
+
+
+void setup() {
+  // initialize both serial ports:
+  Serial.begin(9600);
+  Serial1.begin(9600);
+}
+
+void loop() {
+  // read from port 1, send to port 0:
+  if (Serial1.available()) {
+    int inByte = Serial1.read();
+    Serial.write(inByte); 
+  }
+}