Prefer latin-1 to the replacement character it not utf-8

Closes joepie91#135

Author: Ángel González

pythonwhois/net.py

@@ -109,4 +109,10 @@ def whois_request(domain, server, port=43, timeout=None):
 		if len(data) == 0:
 			break
 		buff += data
-	return buff.decode("utf-8", "replace")
+	try:
+		d = buff.decode("utf-8")
+	except UnicodeDecodeError:
+		d = buff.decode("latin-1", "replace")
+	
+	return d
+