fix(docs): wrong commands

_app/_posts/note/2014-06-10-themes.md

@@ -21,13 +21,13 @@ The AMSF framework ships a default theme [Curtana](http://github.com/amsf/amsf-c
 The easist way to install new theme is via `theme-add`, the following command will install theme Curtana from its official repo `amsf/amsf-curtana`:
 
 ```sh
-$ grunt theme-add=curtana
+$ grunt theme-add --theme=curtana
 ```
 
 If you'd install custom theme from other users, append `--user` in your command, the following command will install a new theme named `bootstrap-sass` from `sparanoid/amsf-bootstrap-sass`
 
 ```sh
-$ grunt theme-add=bootstrap-sass user=sparanoid
+$ grunt theme-add --theme=bootstrap-sass --user=sparanoid
 ```
 
 ### Manually Install