Update README.
Remove conf.py.sample, add brconf.py.
Remove resources/docutils_template.txt.
Add br-runner.py.
Add main.py.
Use argparse, define __version__.
Rename brconf.py to brconfig.py.
Move resources directory to package directory.
Exec config file instead of import, for simpler path control. HTML changes:

Markdown: change output format to HTML5,
Docutils: set initial_header_level to 2, for comp with Markdown.
Auto-generate TOC from h2 instead of h1. h1 is reserved for title.
Add sidebar_toc option to config file.
Add MarkdownTitleFilter (remove first line h1).
Major README update.
HTML template: add top margin to h2.
Add setup.py.
Make __version__ string definition compliant with setup.py.
setup.py: fix version detection, fix long description, change dev status.
Fix version detection in setup.py.
Fix sidebar concatenation and appearance.