* Property /controls/baggage-doors/front-baggage-door-left:
rename to /controls/baggage-door-front-left/position-norm.
* Property /controls/baggage-doors/front-baggage-door-right: ditto.
* Property /controls/baggage-doors/aft-baggage-door: ditto.
* Properties /controls/baggage-door-front-left/command,
/controls/baggage-door-front-right/command,
/controls/baggage-door-aft/command: new.
* Models/cabin.xml: animate the baggage doors using the above properties.
* Properties /controls/table[*]/{in,out,slide}: rename to
/controls/table[*]/{in-position-deg,out-position-deg,slide-position-m}
respectively.
* Citation-II-common.xml: declare all the above properties with their types.
