Log Message:
py-textile: updated to 3.0.3

Version 3.0.3
* BUGFIX: Improve handling code block following extended p block

Version 3.0.2
* BUGFIX: Fix for multiple multi-line paragraphs.

Version 3.0.1
* BUGFIX: Fix improper handling of extended code blocks.

Version 3.0.0
* Drop support for Python 2.6 and 3.2.
* Update to the current version of html5lib
* Bugfixes:
** Fix handling of HTML entities in extended pre blocks.
** Empty definitions in definition lists raised an exception
** Fix handling of unicode in img attributes