list term as a gnuplot header argument

* lisp/ob-gnuplot.el (org-babel-header-args:gnuplot): Term is a gnuplot
  header argument.
missing argument to error message

* contrib/lisp/ox-koma-letter.el (org-koma-letter-template): Missing
  argument to error message.
ox-latex: Use "ulem" package for both underline and strike through

* lisp/org.el (org-latex-default-packages-alist): Load "ulem" package
  by default.  Use "[normalem]" option to preserve \emph definition.
* lisp/ox-latex.el (org-latex-text-markup-alist): Use "\uline" and
  "\sout" commands from "ulem" package.
Merge branch 'maint'
ox-latex: Remove -c argument from compilation with texi2dvi

* lisp/ox-latex.el (org-latex-pdf-process): This argument can cause
  problem with links with a relative path, since compilation happens
  in a different directory.
Merge branch 'maint'
org-element: Fix special block parsing

* lisp/org-element.el (org-element-special-block-parser): Fix typo in
  regexp matching block type.  Also quote the type so it can contain
  special characters.
* testing/lisp/test-org-element.el: Add test.
Merge branch 'maint'
ox: Fix fuzzy link resolution before first headline

* lisp/ox.el (org-export-resolve-fuzzy-link): Fix link resolution when
  link lives before the first headline.
* testing/lisp/test-ox.el: Add test.
ox-latex: Allow hyperref and footnotemark in items description tags

* lisp/ox-latex.el (org-latex-item): Allow hyperref and footnotemark
  in items description tags.  Also remove a unnecessary hack allowing
  footnotemark with an optional argument in the tag.

Initial patch from Rick Frankel.
Merge branch 'maint'
org: Replace AUTO with appropriate language when previewing snippets

* lisp/org.el (org-create-formula--latex-header): Replace AUTO with
  appropriate language when previewing snippets.
fix babel merge params bug from commit 693dda67

  The `org-babel-params-from-properties' command was calling
  `org-babel-merge-params', the output of which was then being fed back
  to another call to `org-babel-merge-params'.  The merge params
  function is not designed to allow this form of recursive calling, and
  as a result many variables were being set to empty values.

  The first noticed side effect of this bug was the breakage of the
  org-babel-load-file command, which relies on default header
  arguments (namely :tangle), which were overwritten by the bug above.

  The fix involved having the `org-babel-params-from-properties'
  function return a list of alists, which may then all be handed to the
  top-level merge-params call.

* lisp/ob-core.el (org-babel-params-from-properties): Now returns a list
  of alists and does *not* call `org-babel-merge-params'.
  (org-babel-parse-src-block-match): Handle new list of lists output of
  `org-babel-params-from-properties'.
  (org-babel-parse-inline-src-block-match): Handle new list of lists
  output of `org-babel-params-from-properties'.
* lisp/ob-exp.el (org-babel-exp-src-block): Handle new list of lists
  output of `org-babel-params-from-properties'.
  (org-babel-exp-non-block-elements): Handle new list of lists output of
  `org-babel-params-from-properties'.
* lisp/ob-lob.el (org-babel-lob-execute): Handle new list of lists
  output of `org-babel-params-from-properties'.
ox-html: Fix typo preventing insertion of link up/link home anchors

* lisp/ox-html.el (org-html-template): Fix typo preventing insertion
  of link up/link home anchors.

Thanks to Daniel G. Gerber for noticing it.
Merge branch 'maint'
doc/org.texi (Orgstruct mode): Fix wrong regexp.

* doc/org.texi (Orgstruct mode): Fix wrong regexp.
customization variable prefix gnuplot code blocks

* lisp/ob-gnuplot.el (*org-babel-gnuplot-prefix*): Customization
  variable prefix gnuplot code blocks.
  (org-babel-expand-body:gnuplot): Customization variable prefix gnuplot
  code blocks.
smarter gnuplot file extension to terminal mapping
* lisp/ob-gnuplot.el (*org-babel-gnuplot-terms*): Smarter gnuplot file
  extension to terminal mapping.
  (org-babel-expand-body:gnuplot): Smarter gnuplot file extension to
  terminal mapping.
gnuplot, close output terminal when opened

* lisp/ob-gnuplot.el (org-babel-expand-body:gnuplot): Gnuplot, close
  output terminal when opened.
ox-html: Use OPTIONS items instead of keywords for booleans

* lisp/ox-html.el (html): Replace "HTML_HTML5_FANCY",
  "HTML_INCLUDE_STYLE" and "HTML_INCLUDE_SCRIPTS" with, respectively,
  ":html5-fancy", "html-style" and "html-scripts" options.
(org-html-html5-fancy): Reformat docstring.
* doc/org.texi (HTML doctypes): Reflect keyword removal.
(CSS support): Reflect keyword removal.

The reasoning behind this change is that keywords can only store
strings as value.  Therefore, they are not suited for toggles ("nil"
vs nil problem).