test for anna
removing test file
Merge branch 'annabranch', remote-tracking branch 'origin' into annabranch
added hypergraph checker function
added small test for hypergraph consistency checker
merged conflict in test_directed_hypergraph.phy
merged conflict in test_directed_hypergraph.phy
merged conflict in test_directed_hypergraph.phy
Made Python3 compatible and fixed merge bug.
Merged consistency check changes from annabranch.