- add nokogiri-1.6.7.diff to fix the mini_portile2 dependency

- updated to version 1.6.7
see installed CHANGELOG.rdoc
=== 1.6.7 / 2015-11-29

==== Notes

This version supports native builds on Windows using the RubyInstaller
DevKit. It also supports Ruby 2.2.x on Windows, as well as making
several other improvements to the installation process on various
platforms.

This version also includes the security patches already applied in
v1.6.6.3 and v1.6.6.4 to the vendored libxml2 and libxslt source.
See #1374 and #1376 for details.

==== Features

* Cross-built gems now have a proper ruby version requirement. (#1266)
* Ruby 2.2.x is supported on Windows.
* Native build is supported on Windows.
* [MRI] libxml2 and libxslt `config.guess` files brought up to date. (#1326) (Thanks, @hernan-erasmo!)
* [JRuby] fix error in validating files with jruby (#1355, #1361) (Thanks, @twalpole!)
* [MRI, OSX] Patch to handle nonstandard location of `iconv.h`. (#1206, #1210, #1218, #1345) (Thanks, @neonichu!)

==== Bug Fixes

* [JRuby] reset the namespace cache when replacing the document's innerHtml (#1265) (Thanks, @mkristian!)
* [JRuby] Document#parse should support IO objects that respond to #read. (#1124) (Thanks, Jake Byman!)