nokogiri version 1.6.3 has been released!

* <http://nokogiri.org>
* <https://github.com/sparklemotion/nokogiri>
* <https://groups.google.com/group/nokogiri-talk>
* <https://github.com/sparklemotion/nokogiri/issues>

Nokogiri () is an HTML, XML, SAX, and Reader parser.  Among Nokogiri's
many features is the ability to search documents via XPath or CSS3
selectors.

XML is like violence - if it doesnt solve your problems, you are not using
enough of it.

Changes:

### 1.6.3 / 2014-07-20

==== Features

* Added Node#document? and Node#processing_instruction?


==== Bug fixes

* [JRuby] Fix Ruby memory exhaustion vulnerability. #1087 (Thanks, @ocher)
* [MRI] Fix segfault during GC when using `libxml-ruby` and `nokogiri`
together in multi-threaded environment. #895 (Thanks, @ender672!)
* Building on OSX 10.9 stock ruby 2.0.0 now works. #1101 (Thanks,
@zenspider!)
* Node#parse now works again for HTML document nodes (broken in 1.6.2+).
* Processing instructions can now be added via Node#add_next_sibling.