libnm-util, libnm-glib: standardize copyright/license headers

- Remove list of authors from files that had them; these serve no
  purpose except to quickly get out of date (and were only used in
  libnm-util and not libnm-glib anyway).

- Just say "Copyright", not "(C) Copyright" or "Copyright (C)"

- Put copyright statement after the license, not before

- Remove "NetworkManager - Network link manager" from the few files
  that contained it, and "libnm_glib -- Access network status &
  information from glib applications" from the many files that
  contained it.

- Remove vim modeline from nm-device-olpc-mesh.[ch], add emacs modeline
  to files that were missing it.

libnm-util/NetworkManager.h

@@ -1,8 +1,5 @@
 /* -*- Mode: C; tab-width: 4; indent-tabs-mode: t; c-basic-offset: 4 -*- */
-/* NetworkManager -- Network link manager
- *
- * Dan Williams <dcbw@redhat.com>
- *
+/*
  * 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 of the License, or
@@ -17,7 +14,7 @@
  * with this program; if not, write to the Free Software Foundation, Inc.,
  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  *
- * (C) Copyright 2004 - 2013 Red Hat, Inc.
+ * Copyright 2004 - 2013 Red Hat, Inc.
  */
 
 /* Definitions related to NetworkManager's D-Bus interfaces.