darcs-hash:d14d125951c63fead0d5c4000983b0c7b670c317

Problem: save-dao on a dao containing references to unsaved objects
would raise an error (revealed by new save-dao tests).

Fixed by editing slot-value-or-id-if-foreign to save any unsaved
daos. slot-value-or-id-if-foreign has also been moved to dao.lisp.

darcs-hash:e4f8d146738959360815fe72f77b422aea628360

darcs-hash:b8f0d3f420a76a6d38de1b255562b7c1424dfd33

darcs-hash:2d3902a9b73755ffe819d19589b7e931ca5db760

darcs-hash:5b2c2d5053fe63e14e4fba43e7573f1ada2788e2

Functions refering to non-transient slots now also reject slots whose allocation is :CLASS.

darcs-hash:c4772436d7dbc5ebbc43ac2d71cce80d56495766

darcs-hash:7de7aacf6896b1ae4fcd4752b7925c2f9c08cc29

darcs-hash:d18db1630fb14a315c532fb434b7c2a4b4c6acf6

Former WITH-CLASS-CONNECTION becomes, more appropriately,
WITH-OBJECT-CONNECTION. New macro WITH-CLASS-CONNECTION starts a
connection absing on a provided class.

darcs-hash:3e17b17e55213a176a08371edf62097ae96e3c64

darcs-hash:7438dca65ddfaedcf8f75372b9ef70251066b8fa

darcs-hash:e652fb1fb077b268fd09a964fd3c19386277224e

darcs-hash:36037370b4fb3e46a634a4181bfd809ca23069a0

darcs-hash:c3f629f6b65bd889d8fb408e12b61d1173760000