`shelly config create' should check if config already exists …

If it does, it will suggest using `shelly config edit` with appropriate
arguments and quit.

[#68558140]
`shelly config create` should ask to specify cloud

when there are multiple clouds in Cloudfile

[#68557874]
Merge pull request #128 from shellycloud/check-if-config-exists

`shelly config create' should check if config already exists, should ask to specify cloud
Don't test build on 1.8
Revert "Added filesystem, database and traffic usage to shelly info output."

This reverts commit a212a06c67eb1fc854d8a83c3bbb6593df19d430.

Conflicts:
	CHANGELOG.md
Fixed wrong usage values given by shelly info command.

Also do not make second request for getting usage informations.

[#68525608]