Add A* Algorithm

[Krakitten]

Currently the heuristic is 0, but this can be iterated on based on the benchmark.

The heuristic must be admisable, which in this context means an F score of > 0 means the items are not valid.

The score is the number of sp under the reqs, but summed with bit shifts so the smallest difference is the most significant. A score of zero means all available sp are used by requirements. Any valid combo has a negative score.

[Krakitten]

=================================================
WynnSolver V1 PASS: 123 FAIL: 0
CascadeBound V1 PASS: 123 FAIL: 0
MyFirstAlgorithm V1 PASS: 123 FAIL: 0
MySecondAlgorithm V1 PASS: 123 FAIL: 0
TheThirdAlgorithm V1 PASS: 123 FAIL: 0
OurSecondAlgorithm V1 PASS: 123 FAIL: 0
TheFourthAlgorithm V1 PASS: 123 FAIL: 0
TheCuteCatAlgo V1 PASS: 123 FAIL: 0
Capy Topo V2 PASS: 123 FAIL: 0
Negative Order V2 PASS: 123 FAIL: 0
Starving Goblin V2 PASS: 123 FAIL: 0
AStar V1 PASS: 123 FAIL: 0
=================================================

[Krakitten]

Though the Benchmark does not run my algorithm for some reason.