Merge remote-tracking branch 'origin/development_master' into PeerAssessmentChristian_2

...n/src/main/java/unipotsdam/gf/interfaces/IAnnotation.java

...n/src/main/java/unipotsdam/gf/interfaces/ISubmission.java

...f/modules/annotation/controller/AnnotationController.java

...va/unipotsdam/gf/modules/annotation/model/Annotation.java

...otsdam/gf/modules/annotation/model/AnnotationMessage.java

...am/gf/modules/annotation/model/AnnotationPostRequest.java

...potsdam/gf/modules/annotation/view/AnnotationService.java

...m/gf/modules/annotation/websocket/AnnotationWSTarget.java

...les/annotation/websocket/AnnotationWebSocketEndpoint.java

...f/modules/submission/controller/SubmissionController.java

...nipotsdam/gf/modules/submission/model/FullSubmission.java

...f/modules/submission/model/FullSubmissionPostRequest.java

...nipotsdam/gf/modules/submission/model/SubmissionPart.java

...f/modules/submission/model/SubmissionPartBodyElement.java

...f/modules/submission/model/SubmissionPartPostRequest.java

...les/submission/model/SubmissionProjectRepresentation.java

...tsdam/gf/modules/submission/model/SubmissionResponse.java

...potsdam/gf/modules/submission/view/SubmissionService.java

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

...en/src/main/webapp/assets/css/unstructured-annotation.css