org-odt.el: Honor "[TABLE-OF-CONTENTS]" directive
* lisp/org-odt.el (org-odt-format-preamble): Don't insert TOC here.
Delay it till the end of export.
(org-odt-begin-document-body): Make a note of the default
position of TOC in `org-lparse-dyn-first-heading-pos'.
(org-odt-insert-toc): Insert TOC as directed by
[TABLE-OF-CONTENTS] line or at the default position.
(org-odt-end-export): Call `org-odt-insert-toc'.
Fix for the following bug:
http://lists.gnu.org/archive/html/emacs-orgmode/2012-01/msg00974.html