Implement logic for parsing result indocator's..
Implement logic for parsing result indocator's..

,,doxument-link element. Also updated some docstrings. See: OIPA-87 / #650

zimmerman-zimmerman/OIPA,zimmerman-zimmerman/OIPA,openaid-IATI/OIPA,zimmerman-zimmerman/OIPA,zimmerman-zimmerman/OIPA,zimmerman-zimmerman/OIPA,openaid-IATI/OIPA,openaid-IATI/OIPA,openaid-IATI/OIPA,openaid-IATI/OIPA