Updated react scripts. Minor fixes. Added overview figure. #233

gui/package.json

gui/src/components/About.js

gui/src/components/App.js

gui/src/components/FAQ.js

gui/src/components/about.afdesign

gui/src/components/about.svg

gui/src/components/api.js

gui/src/components/search/SearchBar.js

gui/src/components/search/SearchContext.js

gui/src/components/test.js

gui/src/index.js

gui/src/serviceWorker.js

gui/yarn.lock

nomad/app/api/info.py

nomad/search.py

tests/app/test_api.py

tests/test_search.py