* lread.c (init_obarray): Declare Qt as special.

This fixes a typo in the 2012-05-15 patch that
tried to declare Qt as special.
* lisp/emacs-lisp/seq.el: New file.

* doc/lispref/sequences.texi (Seq Library): Add documentation for seq.el.
* test/automated/seq-tests.el: New file.