New Search Algorithm : Trace Pathfinder

[Yonaba]

Custom search algorithm, cooked by @rafaelcastrocouto. See here

• It performs better than Astar on some cases
• Already uses binary heaps (two heap internally)
• When expanding from a node, it gives priority to node have a few neighbors.
• Produces more natural paths.

Might require more tests, but would be a nice addendum to Jumper.

[saschagehlich]

+1