Dvc

Fix improper symlink resolving when generating a binary package for osx;

1) Fix duplicated logs;
2) Enable flake8 checks for tests;
3) Add file completion for `dvc add` command for bash/zsh;
4) Fix `dvc run` description;
5) Speedup logger by shortcutting it in non-verbose mode;
6) Mention `private key` in ssh password prompt;
7) Add option to disable ssl in for s3 remotes;
8) Prevent argument duplication with deps/outs in `dvc run`;
9) Introduce `--ignore-build-cache`;
10) Introduce `dvc remote default` command;
11) Support prefix for azure remotes;
12) Fix scheme detection for local outputs/deps with colons in names;
13) Optimize dir cache collection;
14) Fix `--all-pipelines` option for `dvc repro`;
15) Save file size in state db to help detect changes on filesystems with low mtime resolution;
16) Fix daemon when running in binary mode;
17) Use nice urls for analytics/updater endpoints;
18) Various RFC improvements;

1) Support global and system configs;
2) Optimize imports to decrease dvc startup time;
3) Handle KeyboardInterrupt gracefully;
4) Don't re-run the command, if dvc file for it already exists and didn't change; Kudos vernt ;
5) Fix bug in dvc status for external outputs;
6) Introduce dvc run --overwrite-dvcfile;
7) Introduce dvc run --ignore-build-cache;
8) Introduce dvc run --remove-outs;
9) Unprotect outputs on dvc run by default;
10) Don't copy files when unprotecting data, if it is a copy or a reflink;
11) Use md5 instead of ETag for external outputs/dependencies in Google Cloud Storage remote;
12) Fix double logging issue in tests;

1) Respect the `-q|--quiet` option in progress bar and update msg;
2) Verify that `-c|--cwd` is not pointing to a directory that is an output of another stage;
3) Fix error message in `dvc lock` command;
4) Don't report locked callback stages as changed;
5) Exclude `locked` and `metrics` keys when computing md5 for a dvc file;
6) Use quotes to wrap arguments with spaces in a command supplied to `dvc run`;
7) Load default cloud dynamically;

1) Auto-detect output name for `dvc import URL`;
2) Properly handle non-existing files in `dvc checkout`;

1) Fix bug in update checks; Kudos pared ;