markdown-mode 1.6

Changes in markdown-mode 1.6 fall into several categories:

New features

• Implemented org-mode style visibility cycling.
• Support outline minor mode.
• Undefined reference checking (via C-c C-c c, using code by Dmitry Dzhus).
• Wiki links: syntax highlighting and element insertion (C-c C-a w).
• Allow syntax highlighting faces to be customized.
• Insertion of preformatted text sections (C-c C-s p).
• Font locking for inline URIs and email addresses.
• Markdown mode menu (thanks to Greg Bognar for the initial code).

Bug fixes

• Highlight wrapped inline link definitions (thanks to Blake Winton).
• Fix adjacent wiki link font lock bug.
• Support escaping of backticks.
• Many other small font lock tweaks.
• Don’t check for transient-mark-mode in markdown-blockquote-region. This fixes Debian bug #456592 (thanks to Daniel Burrows for the report).
• Apply Greg Bognar’s fix for markdown with an active region.

Usage changes

• Rename blockquote-region to markdown-blockquote-region in accordance with the Emacs major mode coding conventions.
• Several new keybindings.
• Reverted to using colors instead of bold, italic, and fixed-width faces.

Documentation

• A note about SmartyPants support.
• Clarify Transient Mark mode behavior in commentary.
• Clarified documentation strings.

Code

• Properly prefix regex definitions.
• Derive from text-mode instead of fundamental-mode.
• Markdown customize group moved to wp (word processing).
• Prefix wrap-or-insert function.
• Don’t use the kill ring to store wrapped text.