Tweak nav bar

- Rename 'Links' to 'Ergänzende Suche', move left
- Remove icons in nav bar and decrease spacing to avoid wrapping
- Remove 'Hilfe' link, change order of feedback and about links
- Move brand slightly up to vertically align with nav items

NWBib mail, 2014-12-02, HF
Rename `author` to `person` in routes, code, and search UI

NWBib mail 2014-12-02, HF

Also corresponds more closely with what actually happens, see
https://wiki1.hbz-nrw.de/x/BgCHAg (preferredNameForThePerson).