Reorganizing library structure, prep for 2.0.0

core/MyMainDefault.cpp

@@ -0,0 +1,19 @@
+// Initialize library and handle sketch functions like we want to
+
+int main(void) {
+	init();
+	#if defined(USBCON)
+		#if defined(ARDUINO_ARCH_SAMD)
+			USBDevice.init();
+		#endif
+    		USBDevice.attach();
+	#endif
+	_begin(); // Startup MySensors library
+
+	for(;;) {
+		_process();  // Process incoming data
+		if (loop) loop(); // Call sketch loop
+		if (serialEventRun) serialEventRun();
+	}
+	return 0;
+}