lib: use Python dot notation for Markdown extensions Gets rid of: data/env/lib/python2.7/site-packages/markdown/__init__.py:259: DeprecationWarning: Using short names for Markdown's builtin extensions is deprecated. Use the full path to the extension with Python's dot notation (eg: "markdown.extensions.codehilite" instead of "codehilite"). The current behavior will raise an error in version 2.7. See the Release Notes for Python-Markdown version 2.6 for more info. DeprecationWarning)