Implemented TK 13/1
Implemented the StudentCatalogEditor and the StudenModel
Modified Student Class:
add Method toString()
Modified StudentCatalog Class:
add Method setStudentAt()
add Method removeStudents()
Modified Files:
src/java/de/fhworms/ztt/ox/campusdatarepository/Student.java
src/java/de/fhworms/ztt/ox/campusdatarepository/StudentCatalog.java
src_test/java/unit/de/fhworms/ztt/ox/campusdatarepository/StudentCatalogTest.java
src_test/java/unit/de/fhworms/ztt/ox/campusdatarepository/StudentTest.java
