add license notice in main.c

README.md

-# housic
+HoUsIc
+======
 
-command-line utility to translate between Mackie HUI and Open Sound Control
+a small commandline programm to translate between Mackie HUI and Open Sound Control (OSC)
+
+Communicates with a Mackie HUI via ALSA raw_midi driver.
+
+(c) 2020, Dominik Schmidt-Philipp, freakaria.com

main.c

+// housic - translate Mackie HUI MIDI data to OSC and back
+// 
+// Copyright (C) 2020 Dominik Schmidt-Philipp
+// 
+// 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 3 of the License, 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. If not, see <http s ://www.gnu.org/licenses/>.
+
 /*
  * Programmer: Dominik Schmidt-Philipp <schmidt-philipp@kulturteknologi.no>
  * Filename:   main.c
  * Dedicated to seleomlivet
  *
  */
+
 #include <alsa/asoundlib.h>
-#include <pthread.h>             /* for threading        */
+#include <pthread.h>             
 #include <lo/lo.h>
 #include <unistd.h>