Implement simple edge prune
Prune fix for two cases: 1) tell neighbors about the edges I want to keep and 2) ignore missing pruned edges since we both have been visited and may mutually agree on the prune.
Add support for early stopping in scaffolding (by -graphCleanMaxIterations)
Increase usage message's width (we are verbose!)
Only PRUNE when we're supposed to
hack to ensure Ray->Prune job doesn't lose information by becoming a Node between jobs.
only LOG in prune if(verbose)
Merge pull request #136 from uci-cbcl/wbiesing/delay-pruning-02

Implement simple edge prune