More checks for empty string
Commented out a piece of code that seemed to be left from debugging
Even more checks for empty string
Merged Readme file from trunk into fas-behavior branch
HearingSystem.mdzip: 2nd maintenance of model
HearingSystem.mdzip: maintenance of model
User guide: cosmetic corrections in screen shots
User guide updated based on review in the plugin development team
Even more checks for null and empty strings
Typo in code comment removed
