Upgrade Parsedown to 1.0.0-rc.4

Please note that this invalidates my img size patch, I forgot to bring
it upstream. Still TBD.

refs #6165

library/vendor/Parsedown/.gitignore

@@ -1,3 +0,0 @@
-.DS_Store
-.idea
-nbproject

library/vendor/Parsedown/README.md

@@ -1,31 +0,0 @@
-## Parsedown
-
-Better [Markdown](http://en.wikipedia.org/wiki/Markdown) parser for PHP.
-
-***
-
-[ [demo](http://parsedown.org/demo) ] [ [tests](http://parsedown.org/tests/) ]
-
-***
-
-### Features
-
-* [fast](http://parsedown.org/speed)
-* [consistent](http://parsedown.org/consistency)
-* [GitHub Flavored](https://help.github.com/articles/github-flavored-markdown)
-* friendly to international input
-* [tested](https://travis-ci.org/erusev/parsedown) in PHP 5.2, 5.3, 5.4, 5.5 and [hhvm](http://www.hhvm.com/)
-
-### Installation
-
-Include `Parsedown.php` or install [the composer package](https://packagist.org/packages/erusev/parsedown).
-
-### Example
-
-```php
-$text = 'Hello _Parsedown_!';
-
-$result = Parsedown::instance()->parse($text);
-
-echo $result; # prints: <p>Hello <em>Parsedown</em>!</p>
-```

library/vendor/Parsedown/SOURCE

@@ -0,0 +1,6 @@
+RELEASE=1.0.0-rc.4
+FILENAME=parsedown-$RELEASE
+DESTINATION=.
+wget -O ${FILENAME}.tar.gz https://github.com/erusev/parsedown/archive/${RELEASE}.tar.gz
+tar xfz ${FILENAME}.tar.gz -C $DESTINATION/ --strip-components 1 $FILENAME/Parsedown.php $FILENAME/LICENSE.txt
+chmod 644 $DESTINATION/Parsedown.php

library/vendor/Parsedown/VERSION.txt

@@ -1 +0,0 @@
-0.8.3