Update README.md

added verbosity flag to all commands and providers
sorted out prints/logs and added verbosity flag to all commands and providers
Merge remote-tracking branch 'origin/feature/CLOUDIFY-2441-sorting-out-CLI-output' into feature/CLOUDIFY-2441-sorting-out-CLI-output
added a small print before stack trace print
fixed flake8
Merge pull request #18 from CloudifySource/feature/CLOUDIFY-2441-sorting-out-CLI-output

sorted out print/logs and added support for verbosity flag