* src/Utils.py: probably_alive now takes date rather than year
* src/gen/proxy/living.py: create date from year
* src/gen/lib/date.py: added methods to do date math
and return Date object (set_yr_mon_day_offset, copy_offset_ymd)
* src/plugins/Calendar.py: updated to use probably alive date
* src/Filters/Rules/Person/_ProbablyAlive.py: parse entry as date
svn: r9379
* src/GrampsDb/_GrampsInMemDB.py: correctly store global name grouping
* src/GrampsDb/_GrampsBSDDB.py: correctly store global name grouping
* src/gen/lib/name.py: allow grouping equal to surname
* src/Editors/_EditName.py: correct handling of name grouping, issue #647
svn: r9116
(_load_metadata): Load from tuple;
* src/gen/db/base.py (GrampsDbBase.set_researcher): Move details
to the Researcher class.
(set_from): Add method;
(__init__): Copy from source if provided.
svn: r9104
