Use smaller logo in navbar
Use icons and change navigation in navbar

Not using ngIf anymore, we just disable links to
first/last/next/previous in case they shouldn't be active. Means less
repositioning inside the navbar and thus less screen flicker.
Less padding for navigation links

Saving space in the navbar - always a good thing and looks better as
well.
Add titles for navigation links
Extract navbar navigation to own directive
Extract navbar buttons to own directive
Start to turn off stuff in navbar on small screens
Refactor logo reference
Collapse logo to a icon on very small screens
Use icon for search form in navbar

+ a couple of minor fixes to the placeholder text and grid sizes.
Propagate windowWidth to scope in arethusaNavbar
Start to collapse navbar buttons if need be
Use a dropdown to display the collapsed buttons
Extract navbar search to own directive
Extract navbar notifier to own directive
Merge pull request #218 from latin-language-toolkit/navbar_updates2

Collapsible Navbar