fixed articles/topcs for word query, sorting entities in descending count order

...src/main/java/de/vipra/rest/resource/ArticleResource.java

...d/src/main/java/de/vipra/rest/resource/TopicResource.java

...md/src/main/java/de/vipra/cmd/text/SpotlightResponse.java

vipra-ui/app/html/articles/index.html

vipra-ui/app/html/articles/show.html

vipra-ui/app/html/topics/index.html

vipra-ui/app/js/controllers.js