Update README.md: Use --rm with docker run

Without --rm, subsequent runs will fail with an error such as:

    docker: Error response from daemon: Conflict. The container name "/grafana-backup-tool" is already in use by container "e8a6c8a7b717dd52402ea75c7189002bbb80836ae641df1e9865e0f1ec7835b7". You have to remove (or rename) that container to be able to reuse that name.                                                             
    See 'docker run --help'.

Preparing release v0.1.0, see CHANGELOG.md

handle situation where response[1] is a dict not str. Fixes crash in issue #27

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

correction of typos in README.md

Write only one compressed archive and fixed some problems

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

Update tool to support folders

Folders are available since Grafana v.5.0.*. Create scripts to migrate
folders and dashboards (with folders id)

Dashboard replacement

A 412 failure from grafana prevents passing a dashboard with a slug that
is already present (i.e. restoring from a backup) to createDashboard.py.
Handle this by always deleting dashboards with the same name from
grafana prior to POSTing the new dashboard.

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

fix typo