Modified Files:
Added create-methods to instanciate an object by given Element
src/java/de/fhworms/ztt/ox/core/Answer.java
added public static Answer create(Element element)
src/java/de/fhworms/ztt/ox/core/Course.java
added public static Course create(Element element)
src/java/de/fhworms/ztt/ox/core/Exam.java
modified tagnames in XML
src/java/de/fhworms/ztt/ox/core/ExamParticipant.java
added public static ExamParticipant create(Element element)
src/java/de/fhworms/ztt/ox/core/Problem.java
added public static Problem create(Element element)
src/java/de/fhworms/ztt/ox/core/Student.java
added public static Student create(Element element)
Added tests for create-methods:
src_test/java/unit/de/fhworms/ztt/ox/core/AnswerTest.java
src_test/java/unit/de/fhworms/ztt/ox/core/CourseTest.java
src_test/java/unit/de/fhworms/ztt/ox/core/ExamParticipantTest.java
src_test/java/unit/de/fhworms/ztt/ox/core/ProblemTest.java
src_test/java/unit/de/fhworms/ztt/ox/core/StudentTest.java
