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What changes were proposed in this pull request?
Added maximum-weighted matching based on "Efficient Algorithms for Finding Maximum Matching in Graphs" by Zvi Galil, ACM Computing Surveys, 1986.
Why are the changes needed?
More algorithm always good,
Does this PR introduce any user-facing change? If yes is this documented?
New docs included
How was this patch tested?
New tests and internal usecase
Are there any further changes required?
Some internal clean up of the algorithm + more tests