Additional components

## Not wanted

- [x] Media object
 - [x] Media list
- [x] Well
- [x] Responsive embed
- [x] Jumbotron
- [x] Thumbnails
  - [x] Custom content
- [x] List group (see implementation of panel)
  - [x] With badges
  - [x] Custom content
  - [x] Disabled content
  - [x] Coloured content

## Done

- [x] Update / Verify that the cdn_helper is capable of including Font Awesome (in `master`)
- [x]  Nav (in `master`)
  - [x] Pills
  - [x] Tabs
  - [x] Disabled links
  - [x] Breadcrumbs
  - [x] Pagination
  - [x] Pager
    - [x] Aligned pager
- [x] Panel (in `master`)
- [x] Progress bars (in `additional-components`)
  - [x] With label
  - [x] With color
  - [x] With stripes 
  - [x] With animation
  - [x] With stacks

## Todo

- [x] Buttons
  - [x] Button dropdown
    - [x] Dropup variation
    - [x] With disabled items
  - [x] Button groups
    - [x]  With icon-separator
    - [x]  With size
  - [x] Button toolbar
    - [x] Button nesting
    - [x] Vertical variation
    - [x] Justified
- [x] Input (in `input-button-addon`)
 - [x] Input groups (in `master`)
 - [x] With checkboxes/radio (in `master`)
 - [x] Button addons (in `input-button-addon`)