JPS, fixed a* adjust and heap
Merge branch 'master' of https://github.com/acidi/graphs

Conflicts:
	Graphs/src/graphs/Main.java
	Graphs/src/shortestPAlgorithms/Astar.java
	Graphs/src/shortestPAlgorithms/JumpPointSearch.java
	Graphs/test/AstarTest.java
	Graphs/test/PriorityqueueTest.java