Adds missing windows files in generated tarball

contrib/win32/Makefile.am

@@ -2,5 +2,7 @@ SUBDIRS = sys .
 
 EXTRA_DIST = \
 	err.h		\
+	nfc.def		\
 	stdlib.c	\
 	unistd.h 
+	version.rc.in

contrib/win32/nfc_win32.c

@@ -1,48 +0,0 @@
-/*-
- * Public platform independent Near Field Communication (NFC) library
- *
- * Copyright (C) 2013 Alex Lian
- *
- * This program is free software: you can redistribute it and/or modify it
- * under the terms of the GNU Lesser 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 Lesser General Public License
- * along with this program.  If not, see <http://www.gnu.org/licenses/>
- *
- */
-
-/**
- * @file nfc_win32.c
- * @brief Windows System compatibility
- */
-
-// Handle platform specific includes
-#include "contrib/windows.h"
-
-int setenv(const char *name, const char *value, int overwrite)
-{
-  int exists = GetEnvironmentVariableA(name, NULL, 0);
-  if ((exists && overwrite) || (!exists))
-  {
-    if (!SetEnvironmentVariableA(name, value))
-    {
-      // Set errno here correctly
-      return -1;
-    }
-    return 0;
-  }
-  // Exists and overwrite is 0.
-  return -1;
-}
-
-void unsetenv(const char *name)
-{
-  SetEnvironmentVariableA(name, NULL);
-}