FlightGear - Flight Simulator FGAddon

- Fix: [#51] MCP Speedknob uses wrong mousewheel direction
- Fix: [#53] Fuel flow gauge spinning to high - Changed unit to fuel_flow_pph
- Added: main instrument panel
- Added: [#26] fuel pump panel
- Added: [#33] Nav-radio panel
- Added: [#48] new overhead base panel
- Added: [#52] forward lower panel (light/APU/Engine Starters)
- Added: lightning panel
- Improvement: [#11] Recentered wheel texture to avoid wobbling
- Improvement: [#49] Syncing COM-frequencies during FG startup
- Improvement: Updated default COM2 frequencies
- Improvement:Cleaning up repo (uniform line endings, removing unused files etc.)
- Removed: paintkit.tar.gz out of main repo