v0.2.1

• Joystick bindings: Logitech / Saitek X56 H.O.T.A.S. The bindings view now draws the X56 stick
  and throttle (Saitek X-56 Rhino and Logitech-branded units), with Logitech's product photos
  (downloaded on first use, not bundled). The X56's button numbers are fixed, so every control
  shows its bindings right away; Identify the rest asks only for the few inputs that can differ
  (throttle H/I, SLD, mini-stick click, mode switch). A HOTAS shows as STICK / THROTTLE, throttle
  first.
• Joystick photos download only when needed: the view fetches a model's photo the first time a
  device uses that model, instead of every model's photo up front.