Version 0.5.1.28 (EA Beta)
* Improvements
- added a new tutorial part
- enlarged airport zone
- prevent saving crash saves during loading the game
- adjusted runways starting and landing points
- adjusted tooltips when not enouh fuel or cargo
- return half money for selling vehicles
- increased loading and unloading speed for later fueltrucks
- increased price and daily costs for later fuel trucks and stations
- turboprop Light Aircraft now can be accomodated on the Grass Ramp
- fixed Agent Cars not appeared after research
- fixed Agent Cars titles
- improved 45 degrees road snapping

* Bug fixes
- fixed a major memory leak during road construction which led to random crashes
- fixed invisible AGS AL62
- fixed concreate runway starting point(airplanes should not go to turn around)
- fixed traffic system pathfinding in some configurations
- fixed crash when reloading the game