Added PathFinder

Example of path finding with A* and something like Dijikstra algorithms
on 2d array
Revert "Added PathFinder"

This reverts commit ad2bc60ddcf0e88dcdc66b227f025e1569c73fac.
Revert "Revert "Added PathFinder""

This reverts commit f6dc5a62350c814bc39e5fa3d1177e5b1258a69b.