Finished creating the various object classes.
Refactored the parser to now use objects instead of arrays.
Fixed bug in addSession(), addGM() and addPlayer() where the session/GM/player were not added to anything that was publicly accessible.
Changed  to  because it makes more sense.
Fixed a typo in the constructor of the Event and Session classes.
Added an explicit setter for ScenarioMinLevel and ScenarioMaxLevel since they are optional fields on WarHorn but are mandatory for my DB.
Completed refactoring of the code so that it now uses objects instead of arrays.
Merge branch 'feature/refactoring' into dev