Use Composer to import Parsedown library

Reference #613

COPYING

@@ -72,10 +72,6 @@ Files: plugins/wallabag/wallabag.png
 License: MIT License (http://opensource.org/licenses/MIT)
 Copyright: (C) 2015 Nicolas Lœuillet - https://github.com/wallabag/wallabag
 
-Files: plugins/markdown/Parsedown.php
-License: MIT License (http://opensource.org/licenses/MIT)
-Copyright: (C) 2015 Emanuil Rusev - https://github.com/erusev/parsedown
-
 ----------------------------------------------------
 ZLIB/LIBPNG LICENSE
 

composer.json

@@ -11,7 +11,8 @@
     "keywords": ["bookmark", "link", "share", "web"],
     "require": {
         "php": ">=5.3.4",
-        "shaarli/netscape-bookmark-parser": "1.*"
+        "shaarli/netscape-bookmark-parser": "1.*",
+        "erusev/parsedown": "1.6"
     },
     "require-dev": {
         "phpmd/phpmd" : "@stable",

plugins/markdown/markdown.php

@@ -6,8 +6,6 @@
  * Shaare's descriptions are parsed with Markdown.
  */
 
-require_once 'Parsedown.php';
-
 /*
  * If this tag is used on a shaare, the description won't be processed by Parsedown.
  */