Markdown in readme - code blocks errors.

[websafe]

Please compare the readme in one of these:

• http://modules.zendframework.com/websafe/zf-mod-zfc-user-i18n-de-de
• http://modules.zendframework.com/websafe/zf-mod-zfc-user-i18n-pl-pl
• http://modules.zendframework.com/websafe/zf-mod-zfc-user-i18n-ja-JP

with the same files parsed by GitHub:

• https://github.com/websafe/zf-mod-zfc-user-i18n-de-de/blob/master/README.md
• https://github.com/websafe/zf-mod-zfc-user-i18n-pl-pl/blob/master/README.md
• https://github.com/websafe/zf-mod-zfc-user-i18n-ja-JP/blob/master/README.md

The markdown parser on modules.zendframework.com has problems with code blocks enclosed in ~~~~:
~~~~ php
echo '123';
~~~~

Locally I'm testing my Markdown using https://github.com/michelf/php-markdown and the result looks pretty like GitHub flavored markdown.

[gianarb]

Bug label?