Description of config.yaml

[DrrDom]

1. There is missing information which descriptor types are eligible and how they are encoded. in SPCI there is also no such information. It is available only from command line help message of desriptors.py in spci

2. No information about the format of protected ids in SDF file. Space separated or comma-separated list of atom ids

[MariBerry]

Addressed in commit a14bf5e