A 'hello world' application that introduces the basic elements required for an application running under the PathEngine testbed.

Builds on the previous tutorial to add an agent and some moveable obstacles.
Implements basic collision against the environment and against the moveable obstacles.

This tutorial builds on the previous tutorial to add user control of the agent for movement around the environment.
Line collision is used to check collision for a moving agent against the boundaries of obstructed space.
A basic mechanism for sliding against obstacles is presented.

This tutorial builds on 'tutorial1' to introduce some pathfinding queries, and to demonstrate advancing an agent along a path.