v2.0.1

• Improved the three-dimensional linear programming to make it faster and more robust.
• Minor change in the way ORCA lines for static obstacles are handled, which removes the dependence on simulation time step.
• Normalized obstacle vector is stored with each static obstacle line segment to reduce the number of square root computations.
• Fixed the error that caused header files to copied to the wrong directory in the release configuration for Microsoft Visual Studio.
• Removed simple Agent constructors, moving defaultAgent functionality to the RVOSimulator class (no change to public interface).