Build libminiupnpc from source now, and update version.

ext/miniupnpc/upnperrors.h

@@ -0,0 +1,26 @@
+/* $Id: upnperrors.h,v 1.6 2015/07/21 13:16:55 nanard Exp $ */
+/* (c) 2007-2015 Thomas Bernard
+ * All rights reserved.
+ * MiniUPnP Project.
+ * http://miniupnp.free.fr/ or http://miniupnp.tuxfamily.org/
+ * This software is subjet to the conditions detailed in the
+ * provided LICENCE file. */
+#ifndef UPNPERRORS_H_INCLUDED
+#define UPNPERRORS_H_INCLUDED
+
+#include "miniupnpc_declspec.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/* strupnperror()
+ * Return a string description of the UPnP error code
+ * or NULL for undefinded errors */
+MINIUPNP_LIBSPEC const char * strupnperror(int err);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif