Bug fix: Nanoseconds formating was erroneous. Example: 54 nanoseconds was formated to "PT0.54S" instead of "PT0.000000054S"
Bug fix: Large amount of nanoseconds (>= 1_000_000) wasn't treated and lead to Neo4j errors. Now large amount of nanosconds are converted in seconds, with the remainder in nanoseconds.
For #57