clarify and qualify release information

git-svn-id: svn+ssh://svn.code.sf.net/p/gramps/code/trunk@21910 4ae1f11a-8b86-4847-b8af-ab372f36d1fd
6599: Fix matching empty fields in empty locations using regular expressions

git-svn-id: svn+ssh://svn.code.sf.net/p/gramps/code/trunk@21913 4ae1f11a-8b86-4847-b8af-ab372f36d1fd