Only ask for 100ma to cut down on power draw over USB

ArduinoKeyboard.ino

@@ -24,6 +24,7 @@
 
 
 
+extern int usbMaxPower;
 
 //#define DEBUG_SERIAL false
 
@@ -372,6 +373,7 @@ void report(byte row, byte col, boolean value)
 
 void setup()
 {
+    usbMaxPower = 100;
     Serial.begin(115200);
     Keyboard.begin();
     Mouse.begin();