Remove old version of front-end

frontend/src/application.html

frontend/src/category.html

frontend/src/css/main.css

frontend/src/feature-lookup.html

frontend/src/feature.html

frontend/src/img/uni-logo.png

frontend/src/index.html

frontend/src/js/application.js

frontend/src/js/category.js

frontend/src/js/feature-lookup.js

frontend/src/js/feature.js

frontend/src/js/lookup-result.js

frontend/src/js/main.js

frontend/src/js/menu.js

frontend/src/js/search-result.js

frontend/src/lookup-result.html

frontend/src/search-result.html

src/main/java/de/unipotsdam/cs/toolup/model/Model.uml

...a/de/unipotsdam/cs/toolup/ws/resource/SearchResource.java