Can convert flow graph to matrix RI.
Ensure that NumSlaves is 0 when NumReplicas is 0.
Handle NumReplicas=0 case.
Explicitly mark auxiliary edges.

Instead of guessing them based on their capacities.
Optionally allow to dump flow graph.
Enable tests for maxflow generator.

I needed to lower MaxCounts in quickcheck tests because maxflow
generator is much slow as of now.
Simpler defer statement.
Better error message.
cpuprofile flag.
String() method for VbmapParams.
Test that slaves are actually allocated on different tags.