Documentation changes after Empenn Hackathon

[bclenet]

This Pull Request is related to issue [#171 ]

Changes proposed in this Pull Request:

• bug with datalad command
• names of contributors during the Empenn Hackathon
• fixing versions of python dependencies and docker image

Checklist:

• Descriptive title
• Targets the main branch
• Changes are functional
• My code is explicit and comments were added to it
• Code conforms with PEP8
• Tests were added for the changes and they complete successfully
• Existing tests were updated (if needed) and they complete successfully
• Documentation was updated