6319: Remove libgrdb


git-svn-id: svn+ssh://svn.code.sf.net/p/gramps/code/branches/maintenance/gramps40@21779 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/branches/maintenance/gramps40@21782 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/branches/maintenance/gramps40@21784 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/branches/maintenance/gramps40@21786 4ae1f11a-8b86-4847-b8af-ab372f36d1fd