0006483: Listing the Family Trees can corrupt them. Changed get_dbdir_summary to exit if the bsddb_version is not the current bsddb and to return both BSDDB and schema version. Changed family_tree_summary to output both versions. Changed argparser and arghandler to additionally support -t (table) option to list family tree in tab delimited format.

git-svn-id: svn+ssh://svn.code.sf.net/p/gramps/code/branches/maintenance/gramps34@21826 4ae1f11a-8b86-4847-b8af-ab372f36d1fd