## kramdown 0.12.0 released

Some changes in the last release of kramdown lead to a performance drop. Therefore some performance
optimizations have been done resulting in about 15% less created objects (which reduces the garbage
collection pressure) and quite a performance gain (this version of kramdown is the faster than any
previous version when using Ruby 1.9.2) -- see the [tests page](../tests.html) for detailed
information.

Aside from the performance optimizations, a Markdown-only parser based on the kramdown parser has
been added

The "internal" API (which is currently everything except the `Kramdown::Document` class) has changed
again and developers may therefore need to update their extensions! The API changes now allow
parsers and converters to be used without a Kramdown::Document class since this class is just
provided for convenience. All the needed information is now stored in the element tree itself.
Information that has no direct representation as an element is stored in the options of the root
element (e.g. abbreviation definitions). More information can be found in the API documentation.

The API should now be relatively stable and once kramdown reaches 1.0.0, the final API will only be
changed in backwards compatible ways.

## Changes

* 1 major change:

- Added Markdown-only parser

* 6 minor changes:

- Angle brackets can now also be escaped
- Pipe characters in code spans that appear in tables do not need to be escaped anymore
- New option `toc_levels` for specifying the header levels used for the table of contents
(requested by Rick Frankel, RF#28672)
- MathJax instead of jsMath is now used for math output in the HTML converter
- New option `latex_headers` for customizing the header commands for the LaTeX converter
- Removed parsing of HTML doctype in HTML parser

* 6 bug fixes:

- Fixed output of paragraphs starting with a right angle bracket in the kramdown converter
- Invalid span IALs are now left alone and not removed anymore
- Option `entity_output` is now respected when outputting a non-breaking space for emtpy table
cells in the HTML converter (reported by Matt Neuburg)
- Fixed bug where a block IAL before a block HTML element was ignored (reported by Matt Neuburg)
- Fixed bug where block IALs were falsely applied to nested elements (reported by Matt Neuburg)
- Fixed bug RF#28660: Converting `