Update 1.3

Update 1.3 changes:

- Aircraft payload can exceed MTOW

- Weather - Thermals added

- Engines can be turned off/on

- RPM/N1 gauge added

- Speedbrake slider added

- Flaps slider added

- Improved stalls

- Expanded autopilot functionality (Vertical Speed, Altitude change, Autothrottle, Heading)

- Visual/graphics improvements

- Atmosphere appears thinner with altitude

- Parking brake added

- Weather, time, fuel and payload now editable in-flight

- Aircraft lights can be toggled

- Additional Camera views added

- Contrails added

- Other minor feature additions/improvements

- Minor bug fixes