add license, fix doc.

README.org

@@ -140,6 +140,8 @@ Following is an example:
 : #+PANDOC_OPTIONS: standalone:t latex-engine:xelatex
 : #+PANDOC_OPTIONS: "epub-cover-image:/home/a/test file.png" standalone:nil
 : #+BIBLIOGRAPHY: sample.bib
+: # Specifying Multiple values to single options by using colon-sparated lists.
+: #+PANDOC_OPTIONS: filter:pandoc-zotxt:pandoc-citeproc
 : #+PANDOC_OPTIONS: csl:sample.csl
 : #+PANDOC_METADATA: page-progression-direction:ltr
 

ox-pandoc.el

@@ -1,16 +1,29 @@
 ;;; ox-pandoc.el --- org exporter for pandoc. -*- lexical-binding: t; -*-
 
-;; Copyright (C) 2014-2015 KAWABATA, Taichi
+;; Copyright (C) 2014-2017 KAWABATA, Taichi
 
 ;; Filename: ox-pandoc.el
 ;; Description: Another org exporter for Pandoc
 ;; Author: KAWABATA, Taichi <[email protected]>
 ;; Created: 2014-07-20
-;; Version: 1.170707
+;; Version: 1.170817
 ;; Package-Requires: ((org "8.2") (emacs "24") (dash "2.8") (ht "2.0") (cl-lib "0.5"))
 ;; Keywords: tools
 ;; URL: https://github.com/kawabata/ox-pandoc
 
+;; This program is free software; you can redistribute it and/or modify
+;; it under the terms of the GNU General Public License as published by
+;; the Free Software Foundation, either version 3 of the License, or
+;; (at your option) any later version.
+
+;; This program is distributed in the hope that it will be useful,
+;; but WITHOUT ANY WARRANTY; without even the implied warranty of
+;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+;; GNU General Public License for more details.
+
+;; You should have received a copy of the GNU General Public License
+;; along with this program. If not, see <http:https://www.gnu.org/licenses/>.
+
 ;;; Commentary:
 
 ;; This is another exporter for org-mode that translates Org-mode file