added charsets support

config.go

@@ -1,6 +1,9 @@
 package xmpp // import "fluux.io/xmpp"
 
-import "os"
+import (
+	"io"
+	"os"
+)
 
 type Config struct {
 	Address        string
@@ -12,4 +15,5 @@ type Config struct {
 	Retry          int      // Number of retries for connect
 	ConnectTimeout int      // Connection timeout in seconds. Default to 15
 	Insecure       bool     // set to true to allow comms without TLS
+	CharsetReader  func(charset string, input io.Reader) (io.Reader, error) // passed to xml decoder
 }