Completely useless "about" screen

Paved road for talking Xylos RX and logger
Added test button for Xylos TX
Fixed jammer crashing after loading second time

firmware/baseband-tx/proc_audiotx.cpp

@@ -0,0 +1,31 @@
+/*
+ * Copyright (C) 2015 Jared Boone, ShareBrained Technology, Inc.
+ * Copyright (C) 2016 Furrtek
+ * 
+ * This file is part of PortaPack.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2, or (at your option)
+ * any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; see the file COPYING.  If not, write to
+ * the Free Software Foundation, Inc., 51 Franklin Street,
+ * Boston, MA 02110-1301, USA.
+ */
+
+#include "proc_audiotx.hpp"
+#include "portapack_shared_memory.hpp"
+#include "sine_table.hpp"
+
+#include <cstdint>
+
+void AudioTXProcessor::execute(buffer_c8_t buffer) {
+
+}