Use markdown
Add stylesheet for syntax coloring

The file includes the default values to be used for experimenting color
combinations.
Use Pygments as highlighter

Other settings are just because of experimentations
Use fenced code blocks for non-source code display
Highlight sample C++ code
Fix background of source code display
Reduce bottom margin of code block display
Use a transparent background for source code line number display
Bulk commit for baseline

Baseline for code reorganization