added greedy BFS + PQList1 as its PQ
Merge branch 'master' of https://github.com/mmargishvili15/AI-hw2

Conflicts:
	SearchBase.java
dffddfx
cvfvf
Merge branch 'master' of https://github.com/mmargishvili15/AI-hw2

Conflicts:
	SearchBase.java
fddf