implemented task-card #2
fixed javadoc build in build.xml
Modified Files:
build.xml
Added Files:
src/java/de/fhworms/ztt/ox/examrepository/Answer.java
src/java/de/fhworms/ztt/ox/examrepository/Problem.java
src_test/java/unit/de/fhworms/ztt/ox/examrepository/ProblemTest.java
