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;