JANITORIAL: Move copyright notice to a separate file

main_cli.cpp

@@ -1,5 +1,8 @@
-/* main_cli.cpp - Main entry point for the CLI tool, very thin
- * Copyright (C) 2009 The ScummVM project
+/* ScummVM Tools
+ *
+ * ScummVM Tools is the legal property of its developers, whose
+ * names are too numerous to list here. Please refer to the
+ * COPYRIGHT file distributed with this source distribution.
  *
  * This program is free software; you can redistribute it and/or
  * modify it under the terms of the GNU General Public License
@@ -16,6 +19,8 @@
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  */
 
+/* Main entry point for CLI tool */
+
 #include "scummvm-tools-cli.h"
 
 int main(int argc, char *argv[]) {