Log message:
Update markdown-mode to 1.8.1.

Major changes since 1.7:

- Improve syntax highlighting of preformatted text blocks to better
  distinguish them from list items with hanging indentation and nested
  list items.

- Match italic and bold text and inline code fragments across line
  breaks, within a single block, but prevent them from matching across
  blocks.

- Generally improve multi-line font lock by extending the search
  region to include full blocks.

- Fixed an issue, reported by Joost Kremners, where for multi-line
  lists, the position of the list marker was not being added to the
  list of possible indentation levels.

- Make indentation work when the previous line is not indented.

- Avoid a problem where indentation positions were getting skipped
  over when tab cycling.

- Fixed an issue when column 0 is the natural automatic indentation stop.

- Set tab width to 4, the natural tab width for Markdown documents.

- Stop announcing “TAB” in the minibuffer when tab is pressed.

Log message:
Update markdown-mode to 1.7.

Bug fixes:
    - Fixed several font lock issues.
    - Fixed a bug where pressing enter did nothing in longlines-mode.
    - Fixed a problem where emacs-snapshot would hang during
      markdown-enter and markdown-cycle.
    - Fixed an issue with auto-fill-mode and
      markdown-mode<E2><80><99>s indentat

New features:
    - Support filling of list items.
    - Allow customization of font-lock faces
    - Automatic indentation when pressing enter or tab (with cycling upon
      subsequent tab presses).
    - Generate real XHTML for previewing (thanks to Hilko Bengen for the
      patch). This fixes Debian bug #490865. The CSS stylesheet for XHTML
      output is customizable via markdown-css-path.
    - Better URL matching (protocols are customizable through
      markdown-uri-types
    - LaTeX syntax highlighting can be enabled or disabled using the
      customize system (markdown-enable-math).
    - Support for HTML comments (font lock, comment-dwim, etc.).
    - Support filling of definition lists.
    - Fill-paragraph no longer breaks lines inside of square brackets.
    - Add support level 5 and 6 atx-style headers.

Log message:
PKGREVISION bump for elisp packages because of bytecode format changes
in emacs23.

Log message:
Import markdown-mode-1.6 as textproc/markdown-mode.

markdown-mode is a major mode for editing Markdown-formatted text
files in GNU Emacs.