Merge pull request #1 from holdenk/master

Add a test for minimum spanning tree.
edge contraction
Update for the new traversal egg, more flexible bfs/dfs
version bump
cleanup
basic preflow-push for max flow
bug in edge labeling code
Some docs
compute laplacian matrix
graph complements
maximal cliques with Bron-Kerbosch
Merge
Merge branch 'master' of https://github.com/abarbu/graph