Move USB Host Shield and Arduino core to lib/ (#13973)

lib/usbhost/USB_Host_Shield_2.0/examples/Bluetooth/WiiBalanceBoard/WiiBalanceBoard.ino

@@ -0,0 +1,51 @@
+/*
+ Example sketch for the Wii Balance Board Bluetooth library - developed by Kristian Lauszus
+ For more information visit my blog: http://blog.tkjelectronics.dk/ or
+ send me an e-mail:  kristianl@tkjelectronics.com
+ */
+
+#include <Wii.h>
+#include <usbhub.h>
+
+// Satisfy the IDE, which needs to see the include statment in the ino too.
+#ifdef dobogusinclude
+#include <spi4teensy3.h>
+#include <SPI.h>
+#endif
+
+USB Usb;
+//USBHub Hub1(&Usb); // Some dongles have a hub inside
+
+BTD Btd(&Usb); // You have to create the Bluetooth Dongle instance like so
+/* You can create the instance of the class in two ways */
+WII Wii(&Btd, PAIR); // This will start an inquiry and then pair with your Wii Balance Board - you only have to do this once
+//WII Wii(&Btd); // After that you can simply create the instance like so and then press the power button on the Wii Balance Board
+
+void setup() {
+  Serial.begin(115200);
+#if !defined(__MIPSEL__)
+  while (!Serial); // Wait for serial port to connect - used on Leonardo, Teensy and other boards with built-in USB CDC serial connection
+#endif
+  if (Usb.Init() == -1) {
+    Serial.print(F("\r\nOSC did not start"));
+    while (1); //halt
+  }
+  Serial.print(F("\r\nWii Balance Board Bluetooth Library Started"));
+}
+void loop() {
+  Usb.Task();
+  if (Wii.wiiBalanceBoardConnected) {
+    Serial.print(F("\r\nWeight: "));
+    for (uint8_t i = 0; i < 4; i++) {
+      Serial.print(Wii.getWeight((BalanceBoardEnum)i));
+      Serial.print(F("\t"));
+    }
+    Serial.print(F("Total Weight: "));
+    Serial.print(Wii.getTotalWeight());
+    if (Wii.getButtonClick(A)) {
+      Serial.print(F("\r\nA"));
+      //Wii.setLedToggle(LED1); // The Wii Balance Board has one LED as well
+      Wii.disconnect();
+    }
+  }
+}