[ANN] kramdown 1.13.0 released - new man page converter and GFM enhancements

[Thomas Leitner]

## About kramdown

kramdown (sic, not Kramdown or KramDown, just kramdown) is a *free*
MIT-licensed [Ruby](http://www.ruby-lang.org) library for parsing a
superset of Markdown.

It is completely written in Ruby, supports standard Markdown (with some
minor modifications) and various extensions that have been made popular
by the PHP Markdown Extra package and Maruku.

Homepage for installation instructions and documentation:
http://kramdown.gettalong.org


## kramdown 1.13.0 released

The biggest change in this release is the introduction of a converter
for man pages. Although there already exist two solutions ([ronn] and
[kramdown-man]), both are not completely satisfactory:

* Ronn doesn't use standard Markdown syntax for all elements.
* kramdown-man only converts a subset of the available element types.

The new man page converter uses standard kramdown syntax and supports
nearly all element types, including tables.

[ronn]: http://rtomayko.github.io/ronn/
[kramdown-man]: https://github.com/postmodern/kramdown-man

This release also brings some enhancements for the GFM parser. One
thing to note is that the header ID generation is now more compatible
to GFM which also means that **some IDs will be different** - so check
the documents on which you use the GFM parser, especially when you are
using Jekyll or Github Pages.

Organizational-wise, issues and pull requests on Github that pertain to
feature requests have been closed and are now tracked through a
dedicated [kramdown project on
Github](https://github.com/gettalong/kramdown/projects/1).

## Changes

* 4 minor changes:

- Add new converter for man pages
- Header ID generation for the GFM parser is now more compatible to
GFM (fixes [#267], requested by chadpowers)
- Update to the MathJax math engine to allow formatting the preview
as `code` / `pre > code` (pull request [#372] by Florian Klampfer)
- Allow tabs in table separator lines (pull request [#370] by
Shuanglei Tao)

* 2 bug fixes:

- Compactly nested lists are now handled correctly after fixing a bug
in indentation detection (fixes [#368] reported by Christopher Brown)
- GFM parser: Allow indenting the delimiting lines of fenced code
blocks for better GFM compatibility (pull request [#369] by Shuanglei
Tao)

* 2 other fixes and enhancements:

- Added information on how to run tests to `README.md` (fixes [#377]
reported by Aron Griffis)
- Added information about how to use KaTeX with the MathJax math
engine (fixes [#292] reported by Adrian Sieber, information by Dato
Simó)

[#267]: https://github.com/gettalong/kramdown/issues/267
[#368]: https://github.com/gettalong/kramdown/issues/368
[#377]: https://github.com/gettalong/kramdown/issues/377
[#292]: https://github.com/gettalong/kramdown/issues/292
[#372]: https://github.com/gettalong/kramdown/pull/372
[#370]: https://github.com/gettalong/kramdown/pull/370
[#369]: https://github.com/gettalong/kramdown/pull/369

Cheers,
Thomas