Continue working on PR#25 (https://github.com/ysde/grafana-backup-tool/pull/25):
* move all python into src/
* delete boilerplate restore_SOMETHING.sh scripts
* update README.md
* add some things to .gitignore

1.Make it python2 and python3 compatible 2.Try to solve special character when saving dashboard, folder problem 3.Add more verbose log message

* Use the PEP 8 recommended whitespace formatting for .py files
* Add intellij files to the .gitignore file patterns