update installation instructions for Bower

The package will be saved as a dependency.

Closes #643

Author: reneviering

README.md

@@ -22,7 +22,7 @@ License: [MIT](http://www.opensource.org/licenses/mit-license.php)
 #### Bower
 
 ```sh
-bower install knockout-validation --save-dev
+bower install knockout-validation --save
 ```
 
 #### NuGet