* contrib/lisp/ox-deck.el: Remove unnecessary overrides and
rationalize name of in-buffer option for include-default-style.
* contrib/lisp/ox-s5.el: Same as above.
(org-s5--build-head): Renamed from org-s5--build-style for consistency
with ox-html.
* contrib/lisp/ox-deck.el: Default org-deck-directories to "./deck.js".
(org-deck-toc): Sync w/ ox-html name change (org-html--toc-text.)
(org-deck-inner-template): Remove duplicate toc generation code.
* contrib/lisp/ox-s5.el: Add inner template to fix duplicate content
div error.
(org-s5-toc): Sync w/ ox-html name change (org-html--toc-text) and
make toc entries static since s5 doesn't support deep linking.
* contrib/lisp/ox-deck.el: Change menu key to ?d to avoid conflict
with ox-s5.
(org-deck-toc): Use HTML_CONTAINER_CLASS instead of html-container-class.
(org-deck-headline): Simplify code to use HTML_CONTAINER_CLASS
directly, and use org-element-get-relative-level.
(org-deck-item): Use uppercase property.
* contrib/lisp/ox-s5.el (s5): Add configuration variables for S5 meta data.
(org-s5--build-meta-info): ditto.
(org-s5-headline): Simplify code to use HTML_CONTAINER_CLASS directly,
and use org-element-get-relative-level.
(org-s5-plain-list): Use uppercase property.
(org-s5-template-alist): Fix bug. (Don't try and substring nil.)
