* sequences.lisp (dosequence): New macro. DOLIST analagon. (with-sequence-iterator): New macro. WITH-HASH-TABLE-ITERATOR analogon. (%make-sequence-iterator): New internal function. * package.lisp: Export DOSEQUENCE, and WITH-SEQUENCE-ITERATOR. * tests.lisp (dosequence.1): New test case. (with-sequence-iterator.1): Ditto. (with-sequence-iterator.2): Ditto. pullable from http://common-lisp.net/~trittweiler/darcs/alexandria/ -T.