Added the pflags register to the debug output

viper.go

diff --git a/viper.go b/viper.go
index 1b749a2..0fed695 100644
--- a/viper.go
+++ b/viper.go
@@ -876,4 +876,6 @@
 	pretty.Println(v.override)
 	fmt.Println("Aliases:")
 	pretty.Println(v.aliases)
+	fmt.Println("PFlags")
+	pretty.Println(v.pflags)
 }