[feat] Implemented example for survey js api and improved the profile storage

...dam/gf/modules/group/preferences/database/ProfileDAO.java

...les/group/preferences/database/ScaledProfileQuestion.java

...otsdam/gf/modules/group/preferences/excel/ItemWriter.java

...dam/gf/modules/group/preferences/excel/ItemsImporter.java

...am/gf/modules/group/preferences/survey/LocalizedText.java

.../unipotsdam/gf/modules/group/preferences/survey/Page.java

...potsdam/gf/modules/group/preferences/survey/Question.java

...tsdam/gf/modules/group/preferences/survey/SurveyData.java

gemeinsamforschen/src/main/webapp/survey/enterGFM.html

gemeinsamforschen/src/main/webapp/survey/js/enter-gfm.js

gemeinsamforschen/src/main/webapp/survey/showGFM.html

...test/java/unipotsdam/gf/modules/group/SurveyDataTest.java

gemeinsamforschen/src/test/resources/database/fltrail.sql