Baseline
fixed compile time errors.
initializeNodes() not yet implemented
implemented calculateHeuristics()
implemented AStar.
implemented read roads and cities from files.
Working. But pruning not implemented.
Working. But pruning not implemented.
pruning implemented.
Greedy implemented.
Greedy comparator corrected. Dynamic programming implemented.
changed toString 
corrected bug in Dynamic programming.
corrected bug in Dynamic programming and astar--- queue was getting initialized to often even if pruning was not done if a node was to be re-expanded.
corrected bug in heuristic.
corrected coordinates of a city.
Merge branch 'master' of https://github.com/vanditk/AStar.git