Bugfix

Release notes

Bug fixes

• The user was able to install Dev Envs with missing images
• The output of the export command was invalid.
• The dem cp command also copied the installation status.
• The `dem create˙ command checked the image availability, but it shouldn't have.
• The dem create command was able to overwrite an already installed Dev Env.
• Missing exception handling added.

Improvements

• Updates in the help texts, the README, and the docs.