Added
- Existing collectors may now return their results within python, in addition to writing them to disk PR 90 [lgray](https://github.com/lgray).
- This behavior can, at present, only be controlled within python, and is meant for exposing certain aspects of FAST-carpenter plumbing to [coffea](https://github.com/CoffeaTeam/coffea).
Changed
- Fix bug in BinnedDataframe stage, issue 89, PR 93 [benkrikler](https://github.com/benkrikler)
- Pin atuproot to v0.1.13, PR 91
- Tidy the print out at the end of processing, PR 94.