Improve and restructure README
As suggested as part of #117 (closed), the README should be improved in the following ways:
- Add a brief ToC section
- Move documentation up, because it's more important than the development instructions
- Use the ReadTheDocs link!
- Make sure that it's clear that there is more information to be found in the documentation
- Add a troubleshooting remark, again pointing to the documentation
- Add a paragraph about the use case of dantro
- Motivation, statement of need, target audience...
Related issues
Meta task: #117 (closed)
Edited by Utopia Developers