Merge branch 'development_master' into PeerAssessmentAxel

.gitignore

...rc/main/java/unipotsdam/gf/config/GFRocketChatConfig.java

...ain/java/unipotsdam/gf/core/management/user/headLine.java

...amforschen/src/main/webapp/assets/css/annotationStyle.css

...samforschen/src/main/webapp/pages/annotation-document.jsp

gemeinsamforschen/src/main/webapp/pages/createProject.jsp

gemeinsamforschen/src/main/webapp/pages/overview-docent.jsp