6319: Remove libgrdb


git-svn-id: svn+ssh://svn.code.sf.net/p/gramps/code/trunk@21780 4ae1f11a-8b86-4847-b8af-ab372f36d1fd
6521: README needs to be updated, before release


git-svn-id: svn+ssh://svn.code.sf.net/p/gramps/code/trunk@21781 4ae1f11a-8b86-4847-b8af-ab372f36d1fd
6569: transferring from the clipboard causes gramps40 svn 21740 to crash


git-svn-id: svn+ssh://svn.code.sf.net/p/gramps/code/trunk@21783 4ae1f11a-8b86-4847-b8af-ab372f36d1fd
referencedbyselection.py. 0006493: crash during Calculate Preview of a filtered XML export. 

git-svn-id: svn+ssh://svn.code.sf.net/p/gramps/code/trunk@21787 4ae1f11a-8b86-4847-b8af-ab372f36d1fd