Setup the A* Path Planner Algorithm in Gazebo

[huckl3b3rry87]

Feature

Setup the A* Path Planning Algorithm (or others if there is a better one) in Gazebo.

TODO

• 1) figure out the topics that this node subscribes and publishes to
• 2) establish/ensure connection to this node and its subscribed topics
• 3) test using system described in New Features #7

[huckl3b3rry87]

@sumjos now we just need to test it with the Chrono vehicle model