org-e-html/org-e-odt: Changes to caption handling

org-e-html/org-e-odt: Changes to caption handling

* contrib/lisp/org-e-html.el (org-e-html--caption/label-string,
  org-e-html--wrap-label, org-e-html--find-verb-separator): Remove
  functions.
(org-e-html-center-block, org-e-html-drawer, org-e-html-dynamic-block,
org-e-html-fixed-width, org-e-html-inline-src-block,
org-e-html-inlinetask, org-e-html-latex-environment,
org-e-html-plain-list, org-e-html-quote-block,
org-e-html-special-block, org-e-html-verse-block): Apply functions
removal.
(org-e-html-example-block, org-e-html-src-block): Allow textarea. Use
new caption scheme.
(org-e-html-horizontal-rule): Cleanup.
(org-e-html-link--inline-image, org-e-html-table): Use new caption
scheme.
* contrib/lisp/org-e-odt.el (org-e-odt--wrap-label,
  org-e-odt--caption/label-string): Remove functions.
(org-e-odt-format-label): Use new caption scheme.
(org-e-odt-center-block, org-e-odt-drawer, org-e-odt-dynamic-block,
org-e-odt-example-block, org-e-odt-fixed-width,
org-e-odt-horizontal-rule, org-e-odt-inlinetask,
org-e-odt-latex-environment, org-e-odt-plain-list,
org-e-odt-quote-block, org-e-odt-special-block,
org-e-odt-verse-block): Apply functions removal.

In e-html export, textareas are now possible with the following
attribute:

  #+ATTR_HTML: :textarea t :width 80 :height 10

:width and :height keywords are optional.