• Fixed segfault caused by missing NULL-check (#67).

NOTE: Misaka doesn't work in Python 2.6 anymore, because pycparser,
a dependency of CFFI, doesn't work in Python 2.6 anymore.

• Add a new renderer class with XSS protections. By Changaco. (#60)
• Add Python 2.6 support. By sprin. (#48)
• Add Termux installation instructions to documentation.
• Update Hoedown source files.

• Rename Markdown.render to Markdown.__call__.
• Add a bechmark testcase to chibitest.
• Simplify arguments of list, list_item, autolink and table_cell render callbacks.
• Rewrite. CFFI and Hoedown instead of Cython and Sundown.
• Remove pre- and postprocessor support.
• Smartypants is a normal function instead of a postprocessor.
• Documentation now uses Sphinx.