Modify 6XX fields and update regex for lifespan/birtYear/deathYear
Modify 6XX fields and update regex for lifespan/birtYear/deathYear

Change mapping of 600, 610, 611 and 655. In progress...
Update regex to match on the entire string and only split when it
contains digits and '-'. Otherwise map to lifespan.

libris/librisxl,libris/librisxl,libris/librisxl