First support for md extensions; Package all needed dependencies in the repo

Source/Libs/markdown/extensions/nl2br.py

@@ -0,0 +1,33 @@
+"""
+NL2BR Extension
+===============
+
+A Python-Markdown extension to treat newlines as hard breaks; like
+GitHub-flavored Markdown does.
+
+See <https://Python-Markdown.github.io/extensions/nl2br>
+for documentation.
+
+Oringinal code Copyright 2011 [Brian Neal](https://deathofagremmie.com/)
+
+All changes Copyright 2011-2014 The Python Markdown Project
+
+License: [BSD](https://opensource.org/licenses/bsd-license.php)
+
+"""
+
+from . import Extension
+from ..inlinepatterns import SubstituteTagInlineProcessor
+
+BR_RE = r'\n'
+
+
+class Nl2BrExtension(Extension):
+
+    def extendMarkdown(self, md):
+        br_tag = SubstituteTagInlineProcessor(BR_RE, 'br')
+        md.inlinePatterns.register(br_tag, 'nl', 5)
+
+
+def makeExtension(**kwargs):  # pragma: no cover
+    return Nl2BrExtension(**kwargs)