What's Changed
* Update readme by dmpetrov in https://github.com/iterative/datachain/pull/233
* Arrow nrows fix by dberenbaum in https://github.com/iterative/datachain/pull/221
* only combine final step for limit by mattseddon in https://github.com/iterative/datachain/pull/230
* Fix renaming object or normal signal with `.mutate()` by ilongin in https://github.com/iterative/datachain/pull/217
* Fixing too many files open, and adding reconnect by dtulga in https://github.com/iterative/datachain/pull/229
**Full Changelog**: https://github.com/iterative/datachain/compare/0.2.16...0.2.17