Notification toggle btn isn o longer blocking the responsive nav toggle
improved notifications for use with badges
Fix brand switching, better notifications icon

Due to Bootstrap not fully supporting visibility classes for inline
elements, both brand versions appeared on small and larger screen sizes.

Replace bullhorn icon by bell, seems more understandable.
Remove .badge from `navigation.less`

Remove class, since I don't see this feature necessary.
Merge branch 'pr/3'

* pr/3:
  Remove .badge from `navigation.less`
  Fix brand switching, better notifications icon
  improved notifications for use with badges
  Notification toggle btn isn o longer blocking the responsive nav toggle