* an24b-set (sim/long-description): simplify and expand.
(sim/tags/ga): delete.
(sim/aircraft-data): Save payload across sessions.
(sim/allow-toggle-cockpit): true.
(input/keyboard): override Ctrl+A, Ctrl+H and Ctrl+P keyboard bindings to
drive the autopilot.
* Nasal/fuel.nas: Add a range computer like in the Lockheed1049h; see
/consumables/fuel/*.
