Resolve "Replace _ (underscore) with / (slash) as HIERARCHY_SEPARATOR given in data header when reading in data"
Replace underscore by slash in IDs mentioned in CSV data header
- Underscores in IDs of CSV data header need to be replaced by a slash.
- Character used in IDs of CSV data header need to be configurable.
- Adapt README to take into account new configuration variables.
Closes #152 (closed)