added XML functionality to classes. methods toXML(), fromXML() now
store the objects to XML vice versa. Corrected Tests.
Modified Files:
src/java/de/fhworms/ztt/ox/campusdatarepository/CourseCatalog.java
src/java/de/fhworms/ztt/ox/campusdatarepository/StudentCatalog.java
src/java/de/fhworms/ztt/ox/core/Answer.java
src/java/de/fhworms/ztt/ox/core/Course.java
src/java/de/fhworms/ztt/ox/core/Exam.java
src/java/de/fhworms/ztt/ox/core/ExamParticipant.java
src/java/de/fhworms/ztt/ox/core/ListFactory.java
src/java/de/fhworms/ztt/ox/core/Problem.java
src/java/de/fhworms/ztt/ox/core/Student.java
src/java/de/fhworms/ztt/ox/deployment/DeploymentDeamon.java
src/java/de/fhworms/ztt/ox/examrepository/ProblemCatalog.java
src_test/java/unit/de/fhworms/ztt/ox/campusdatarepository/CourseCatalogTest.java
src_test/java/unit/de/fhworms/ztt/ox/campusdatarepository/StudentCatalogTest.java
src_test/java/unit/de/fhworms/ztt/ox/core/ExamTest.java
src_test/java/unit/de/fhworms/ztt/ox/deployment/ExamDeploymentTest.java
src_test/java/unit/de/fhworms/ztt/ox/examrepository/ProblemCatalogTest.java
