Dvc

1) [Fix color codes on Windows](https://github.com/iterative/dvc/issues/1698);
2) Migrated from nose to pytest;
3) [Started using progress bar for checkout instead of verbose info messages](https://github.com/iterative/dvc/issues/1643);
4) [Refactored brancher](https://github.com/iterative/dvc/pull/1709);
5) [Updated *sh completion](https://github.com/iterative/dvc/issues/1732);
6) [Increased verbosity of dvc info messages](https://github.com/iterative/dvc/issues/1735) Kudos PeterFogh 🏅 ;
7) [Added support for `dvc pipeline show --tree`](https://github.com/iterative/dvc.org/issues/219) Kudos puhoshville 🏅 ;
8) [Fixed not working metrics show in `dvc repro -m`](https://github.com/iterative/dvc/issues/1740);
9) [Fixed link removal bug in `dvc checkout/pull`](https://github.com/iterative/dvc/issues/1788);
10) [Improved `dvc cmd --help` by including links to documentation](https://github.com/iterative/dvc/pull/1767) Kudos J0 🏅 ;

Welcome new contributors PeterFogh J0 puhoshville ! 🚀

1) [Fix bug where wdir was not converted to unixpath when saved to a dvc file](https://github.com/iterative/dvc/issues/1721);

1) Warn when there is no cache locally or on the remote;
2) Fix NotDvcRepoError message;
3) Ignore cryptography's warnings caused by paramiko;
4) Fix posixpath/ntpath mixup in ssh remote driver on windows;

1) Support choosing between `list_objects` and `list_objects_v2` for s3 remote using `listobjects` config option;
2) Use decorator for cleaning up gitignore on error and reminding to add to git;
3) Fix bug in dvc state where inode wasn't converted to sqlite format properly;

1) Fix the message for dvc file formatting error;
2) Support `-f|--file` for `dvc add`;
3) Fix bug in ssh remote driver on windows;

1) Fix stage checksum calculation when `wdir` is default;