Dvc

1) [Make `dvc get` print a hint when dvc-file is specified instead of output path](https://github.com/iterative/dvc/issues/2468);
2) [Deduplicate data on second `dvc add`](https://github.com/iterative/dvc/issues/2016);
3) [Properly handke `dvc get` on a git repo that is not a dvc repo](https://github.com/iterative/dvc/issues/2430);
4) [Fix bug in `dvc get`, that wasn't restoring proper environment when running git from our binary built by pyinstaller](https://github.com/iterative/dvc/issues/2471);

1) [Fixed bug that made dvc unprotect files for every use](https://github.com/iterative/dvc/issues/2125#issuecomment-527945049);

1) [Fix bug in `dvc add` where it was setting incorrect `wdir`](https://github.com/iterative/dvc/pull/2427);
2) [Fix bug in `gc` for clouds, where it wasn't able to process paths with subdirectories](https://github.com/iterative/dvc/issues/2394);
3) [Fixed a bunch of confusing messages from `dvc repro` output](https://github.com/iterative/dvc/pull/2440);
4) [Fixed bug in `active_stages`](https://github.com/iterative/dvc/pull/2428);
5) [Improved progress bars for pull/push/checkout/etc operations](https://github.com/iterative/dvc/pull/2436);
6) [Fixed `dvc remove` help message](https://github.com/iterative/dvc/pull/2457);
7) [Fixed misleading error message when trying to `dvc get` from invalid dvc repo](https://github.com/iterative/dvc/pull/2460);

1) [Made first steps to improving UI by migrating to tqdm instead of using our own progress bar](https://github.com/iterative/dvc/pull/2333);
2) [Fixed bug in `dvc move`, that wouldn't commit changes properly](https://github.com/iterative/dvc/pull/2421);
3) [Added support for kerberos for ssh remotes](https://github.com/iterative/dvc/pull/2424); Kudos JoshuaPostel :tada:

1) [Added support for ACL for s3 remotes](https://github.com/iterative/dvc/issues/2414); Kudos AlJohri :tada:
2) [Added proper handling for unsupported `no_traverse false` option in HTTP(s) remotes](https://github.com/iterative/dvc/issues/2380);

1) [Added support for streaming data files from remotes through our Python API](https://github.com/iterative/dvc/issues/2311);
2) [Fixed git post-checkout hook to not run `dvc checkout` if the user is simply checking-out a specific file](https://github.com/iterative/dvc/issues/2400); Kudos gthb :tada:
3) [Fixed bug in signal handler for `dvc run/repro`](https://github.com/iterative/dvc/issues/2406);