MaVehicles library v0.7.1

• API changes:
  • Used the Steering enum to simplify the APIs of the Bike, Vehicle, and Wheel classes.
  • Added static qualifiers to 5 protected methods:
    • Sky.getAmbientLight()
    • Sky.getApplication()
    • Sky.getDirectionalLight()
    • Sky.getShadowRenderer()
    • Vehicle.addPassenger()
  • Protected the constructors of 6 abstract classes:
    • Bike
    • Engine
    • Sky
    • TireSettings
    • Vehicle
    • World
• Bugfixes:
  • sounds aren't always muted before being detached
  • drop orientation isn't taken into account by Prop.addToWorld()
• New library features:
  • Added findStartLocation(), isLoaded(), and scaledHeight() methods to the Prop class.
  • Added areShadowsEnabled() and setShadowsEnabled() methods to the Sky class.
  • Added the Steering enum to describe how wheels are steered.
• Updated 17 textures provided by the Georg project.
• Began using the CheckStyle tool.
• Upgrade JMonkeyEngine to v3.6.0-stable, Garrett to v0.5.3, Heart to v8.3.2, and Minie to v7.4.0 .