Support verbose command option

[ftylitak]

Add support to "-v, --verbose" option to the cli.

This will enable printing of progress messages regarding the files that are being handled at the moment.

Affected operations:

• mkdir
• put
• rm
• rmdir
• run

(also some whitespaces have been removed automatically by the linter.)

[devxpy]

This is a good idea, thanks!

But the implementation you proposed looks a little ugly to me.

I'd be much more comfortable with a logging based solution.

Then we can just have the --verbose switch on the common cli() entrypoint instead of each command, and call Logger.setLevel() there.

[ftylitak]

Hello @devxpy

here are the changes for the logging implementation.

I have updated the branch to your latest changes and made the logging implementation on top....though (for a reason that I do not know) github sees as commits of this pull request also commits that took place after the initial submission of the Pull Request.

If you want the Pull Request to be cleaner, I could close this PR and open a new one.

Waiting for your feedback.

[ftylitak]

@devxpy finally did a reset and rebase to get rid of all the irrelevant commits. I hope now it would be easier to review.