Added 'ApplicationTypeEnum' that defines the type of application (command line...

Added 'ApplicationTypeEnum' that defines the type of application (command line or GUI).  The application type is a static member in the class ApplicationInformation since this class is in the Common module and thus accessible to all other modules.  The application type is now a required parameter in the SessionManager's constructor so that the application type is properly set and this constructor then sets the application type in ApplicationInformation.