Retropath2-wrapper

- skip packages installation by default to avoid failed updates

- set current user as owner of downloaded Knime folder
- change output error codes:
* 4: RetroPath2.0 has found no solution
* 5: Time limit reached

- import colored logger from brs_utils

- change print out and return codes
- add logger
- remove rdkit package
- add comments

- change print out and return codes

- ability to take input files without good extensions (.csv, .gz)