org-odt.el: Add support for annotation blocks

org-odt.el: Add support for annotation blocks

* contrib/lisp/org-lparse.el (org-lparse-special-blocks): New
variable.  Add "annotation" blocks in addition to the already
existing "list-table" blocks.
(org-lparse-get-block-params): New helper routine to read
params passed to a special block.  Used in conjunction with
OpenDocument annotations and with parsing of "#+ATTR_ODT:..."
lines attached to images.
(org-lparse-par-open-stashed): New let-bound variable.
(org-do-lparse): Bind `org-lparse-par-open-stashed'.  Treat
all blocks listed in `org-lparse-special-blocks' as special
environments.  Honor options passed as part of
"#+begin_<block-name>[options]".
(org-lparse-preprocess-after-blockquote-hook): Handle all
blocks listed in `org-lparse-special-blocks' specially.
(org-lparse-strip-experimental-blocks-maybe-hook): New hook
that hooks up to `org-export-preprocess-hook'.  Removes blocks
listed under `org-lparse-special-blocks' while exporting to
formats other than "odt" or "xhtml".
(org-lparse-begin-environment, org-lparse-end-environment):
Modified signature to accomodate block params.
(org-lparse-stash-save-paragraph-state)
(org-lparse-stash-pop-paragraph-state): New helper routines
for use with emitting of OpenDocument annotations.
(org-lparse-list-table-enable): Removed.  "list tables" are
now always enabled.

* contrib/lisp/org-odt.el (org-odt-begin-annotation)
(org-odt-end-annotation): New routines.
(org-odt-begin-environment, org-odt-end-environment): Handle
block params.  Handle the new "annotation" block.
(org-odt-format-author, org-odt-iso-date-from-org-timestamp):
New helper routnes for emitting author and comment timestamps
with annotation blocks.
(org-odt-update-meta-file): Use above routines.
(org-export-odt-format-image): Use
`org-lparse-get-block-params' to parse inline image attributes.
(org-odt-format-date): Removed.  Superceded by
`org-odt-iso-date-from-org-timestamp'.

See http://lists.gnu.org/archive/html/emacs-orgmode/2011-10/msg01251.html