/cc @andytson - Wanted to CC you in here so you could see some changes I
made.
First, I changed commit to opt-in, so you set "commit": true to get
commit behavior. This simplifies the logic a bit. Then, I removed the
skipping for StepExport and StepCommit and put that into the Builder
itself. This simplifies those steps (limits abstraction leakage).
Otherwise, everything looks great!
Chris Bednarski
Mitchell Hashimoto
Andy Thompson