FAS for MagicDraw Code

FAS-behavior: Added robustness against empty types of action pins

Tutorial document: mentioned the JukeBox model (fixes ticket #43)

Jukebox.mdzip: fixed ticket #41-#42

Made more checks for null, empty strings etc.

HearingSystem.mdzip sample model restructured such that it also serves as a good example for FAS-behavior

Adapted test case to requirement from last commit

Requirement 4.3.2 updated to specify desired format of package name (like already implemented)

Worked on log message handling

Worked on logger

Worked on msg display.