Markdown help

For complete description, see John Gruber's original specification and the Github-flavored Markdown info page.

Markdown Cheatsheet is also a very useful reference and showcase, which is copied here for convenience:

Table of contents

• Headers
• Emphasis
• Lists
• Links
• Images
• Code and syntax highlighting
• Tables
• Blockquotes
• Inline HTML
• Horizontal rule
• Line Breaks