Visibilities, cleaning up, refactoring
New tests
JavaDoc typo
Priority Heap
Rename method
Priority Heap
HeapElement as separate class
Refactor
Add A* to Run time tests
Fix tests
check valid maxsize
Small change
A* Algorithm
JavaDoc typo
Update
Revert "Update"

This reverts commit c8dc4fb32ae5ebc5f391c392e26c0a065f332e4d.
Update
Document testing
validCoordinate checks
move test