v4 - btn-info used in button-dropdown but not on the main buttons page.

Created by: Qqwy

The btn-info button style is missing from http://v4-alpha.getbootstrap.com/components/buttons/#examples

but still used on: http://v4-alpha.getbootstrap.com/components/button-dropdown/

Either btn-info should be removed at the components/button-dropdown page, or it should be added on the components/buttons page