Edmonds algorithm

An implementation of Edmond's algorithm to obtain the maximum spanning weight tree from a graph.

Folks,
This is an implementation of the Edmond's algorithm taken from Alan Gibbons book algorithmic graph theory to obtain
a maximum weight spanning tree or a maximum branching.

I fixed a few mistakes in the published algorithm and have made this implementation available.

I believe you should be able to obtain the minimum spanning tree too by changing weights and changing them back after the application of the algorithm.