update and outsource default header values
Merge branch 'master' of gh:Catrobat/Catty into issue#84

* 'master' of gh:Catrobat/Catty:
handle serialization for program- and script-classes
Merge branch 'issue#84' of gh:Catrobat/Catty into issue#282

* 'issue#84' of gh:Catrobat/Catty:
  handle serialization for program- and script-classes
  update and outsource default header values