bumped to v1.6.0

- rewrote daemon plugin and remove 3rd party dep.
  so we have a full compatibility with nacl and Go Playground now.
- plan9 and other OSes are **portable** now, not only nacl.
  Noted that is just `portable`, not supports.

Author: hedzr

doc.go

@@ -8,7 +8,7 @@ const (
 	// AppName const
 	AppName = "cmdr"
 	// Version const
-	Version = "1.5.5"
+	Version = "1.6.0"
 	// VersionInt const
-	VersionInt = 0x010505
+	VersionInt = 0x010600
 )