Added asciidoc output to README.

README

@@ -16,7 +16,8 @@ another, and a command-line tool that uses this library. It can read
 and [LaTeX]; and it can write plain text, [markdown], [reStructuredText],
 [HTML], [LaTeX], [ConTeXt], [RTF], [DocBook XML], [OpenDocument XML], [ODT],
 [GNU Texinfo], [MediaWiki markup], [EPUB], [Textile], [groff man] pages,
-[Emacs Org-Mode], and [Slidy], [DZSlides], or [S5] HTML slide shows.
+[Emacs Org-Mode], [AsciiDoc], and [Slidy], [DZSlides], or [S5] HTML
+slide shows.
 
 Pandoc's enhanced version of markdown includes syntax for footnotes,
 tables, flexible ordered lists, definition lists, delimited code blocks,
@@ -155,8 +156,8 @@ Options
     `mediawiki` (MediaWiki markup), `textile` (Textile), `org` (Emacs
     Org-Mode), `texinfo` (GNU Texinfo), `docbook` (DocBook XML),
     `opendocument` (OpenDocument XML), `odt` (OpenOffice text document),
-    `epub` (EPUB book), `slidy` (Slidy HTML and javascript slide show),
-    `dzslides` (HTML5 + javascript slide show),
+    `epub` (EPUB book), `asciidoc` (AsciiDoc), `slidy` (Slidy HTML and
+    javascript slide show), `dzslides` (HTML5 + javascript slide show),
     `s5` (S5 HTML and javascript slide show), or `rtf` (rich text
     format). Note that `odt` and `epub` output will not be directed to
     *stdout*; an output filename must be specified using the `-o/--output`
@@ -1519,6 +1520,9 @@ reStructuredText
   ~ It will be rendered using an interpreted text role `:math:`, as described
     [here](http://www.american.edu/econ/itex2mml/mathhack.rst).
 
+AsciiDoc
+  ~ It will be rendered as `latexmath:[...]`.
+
 Texinfo
   ~ It will be rendered inside a `@math` command.
 
@@ -2036,6 +2040,7 @@ Christopher Sawicki, Kelsey Hightower.
 [Haskell]:  http://www.haskell.org/
 [GNU Texinfo]: http://www.gnu.org/software/texinfo/
 [Emacs Org-Mode]: http://orgmode.org
+[AsciiDoc]: http://www.methods.co.nz/asciidoc/
 [EPUB]: http://www.idpf.org/
 [GPL]: http://www.gnu.org/copyleft/gpl.html "GNU General Public License"
 [DZSlides]: http://paulrouget.com/dzslides/