Add python engine

resources.html

@@ -146,7 +146,7 @@
 <ul>
 <li><a href="https://github.com/jgm/commonmark.js">commonmark.js</a></li>
 <li><a href="https://github.com/cky/wmd">showdown</a>, not maintained any more</li>
-<li><a href="https://code.google.com/p/pagedown/">pagedown</a>, StackOverflow</li>
+<li><a href="https://github.com/StackExchange/pagedown">pagedown</a>, StackOverflow</li>
 <li><a href="https://github.com/coreyti/showdown">coreyti/showdown</a></li>
 <li><a href="https://github.com/chjj/marked">marked</a></li>
 </ul></li>
@@ -154,6 +154,10 @@
 <ul>
 <li><a href="http://michelf.ca/projects/php-markdown/">PHP Markdown</a></li>
 </ul></li>
+<li>Python
+<ul>
+<li><a href="https://pypi.python.org/pypi/CommonMark">CommonMark</a></li>
+</ul></li>
 <li>Ruby
 <ul>
 <li><a href="https://github.com/vmg/redcarpet">Redcarpet</a> </li>

resources.md

@@ -88,6 +88,8 @@
   * [marked](https://github.com/chjj/marked)
 * PHP
   * [PHP Markdown](http://michelf.ca/projects/php-markdown/)
+* Python
+  * [CommonMark](https://pypi.python.org/pypi/CommonMark)
 * Ruby
   * [Redcarpet](https://github.com/vmg/redcarpet) 
   * [Maruku](https://github.com/bhollis/maruku)

resources_content.html

@@ -122,7 +122,7 @@
 <ul>
 <li><a href="https://github.com/jgm/commonmark.js">commonmark.js</a></li>
 <li><a href="https://github.com/cky/wmd">showdown</a>, not maintained any more</li>
-<li><a href="https://code.google.com/p/pagedown/">pagedown</a>, StackOverflow</li>
+<li><a href="https://github.com/StackExchange/pagedown">pagedown</a>, StackOverflow</li>
 <li><a href="https://github.com/coreyti/showdown">coreyti/showdown</a></li>
 <li><a href="https://github.com/chjj/marked">marked</a></li>
 </ul></li>
@@ -130,6 +130,10 @@
 <ul>
 <li><a href="http://michelf.ca/projects/php-markdown/">PHP Markdown</a></li>
 </ul></li>
+<li>Python
+<ul>
+<li><a href="https://pypi.python.org/pypi/CommonMark">CommonMark</a></li>
+</ul></li>
 <li>Ruby
 <ul>
 <li><a href="https://github.com/vmg/redcarpet">Redcarpet</a> </li>