Added registration.

Currently doesn't return any valid result, hence host believes device
failed to register, however, insecure storage of keys does occur.

U2F_Register_APDU.hpp

@@ -0,0 +1,16 @@
+#pragma once
+#include "U2F_Msg_CMD.hpp"
+#include "Storage.hpp"
+
+struct U2F_Register_APDU : U2F_Msg_CMD
+{
+	std::array<uint8_t, 32> challengeP;
+	Storage::AppParam       appP;
+	Storage::KeyHandle      keyH;
+
+	public:
+		U2F_Register_APDU(const U2F_Msg_CMD &msg, const std::vector<uint8_t> &data);
+
+		void respond();
+};
+