Dvc

1) [Add support for reflink, hardlink, symlink for ssh external outputs](https://github.com/iterative/dvc/issues/1652);
2) [Fix `dvc move` bug](https://github.com/iterative/dvc/pull/2485);
3) [Deduplicate links on checkout and ensure proper link type and permissions](https://github.com/iterative/dvc/pull/2488);
4) [Use NFS and CIFS compatible locks in dvc repository](https://github.com/iterative/dvc/pull/2461);
5) [Fixed bug in improper relpath calculation which was causing problems with deeply nested dependencies](https://github.com/iterative/dvc/pull/2496);
6) [Prevent using dvcfiles as dependencies or outputs](https://github.com/iterative/dvc/pull/2493);
7) [Optimized imports to speedup dvc launch time](https://github.com/iterative/dvc/issues/2445);
8) [Stop corrupting git hooks by `dvc install`](https://github.com/iterative/dvc/pull/2505);
9) [Move repo locks from CLI to API](https://github.com/iterative/dvc/pull/2519);
10) [Make `dvc pull` download data for `dvc import`ed dvcfiles](https://github.com/iterative/dvc/pull/2499);
11) [Fixed bug in daemon launcher that sometimes wasn't calling the same script that it was running from](https://github.com/iterative/dvc/pull/2523);
12) [Added a workaround for `pyenv` modifying `PATH` when running `dvc`](https://github.com/iterative/dvc/pull/2525);

1) [Fix bug in our git hooks, which made them incompatible with dash](https://github.com/iterative/dvc/commit/2d2ac67e50e4614d5a4d236b15171bd3b50648e6);
2) [Don't write default wdir to DVC-files](https://github.com/iterative/dvc/pull/2478);
3) [Introduce `--always-changed` flag for `dvc run`](https://github.com/iterative/dvc/pull/2479);
4) [Fix `gitignore` bug when using `symlinks` as link type](https://github.com/iterative/dvc/issues/2476);

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: