Moved away from shared pointers in event handlers - didn't make sense to expose the event management implementation to handlers.

Also some other bits of tidying.

src/DebugToolDrivers/Microchip/AtmelICE/AtmelIce.cpp

@@ -18,7 +18,7 @@ void AtmelIce::init() {
 
     if (!usbHidInterface.isInitialised()) {
         usbHidInterface.detachKernelDriver();
-        UsbDevice::setConfiguration(0);
+        this->setConfiguration(0);
         usbHidInterface.init();
     }