Log Message:
Changes 2.14:
* Documentation:
  - Improved ContentNode documentation

Changes 2.13.1:
* First unstable 2.13.x release, to become stable 2.14.x, for GNOME 2.14.
* Node:
  - Added find() overload that takes namespaces to register during the search,
  using xmlXPathRegisterNs().
  - set_namespace(): When creating a default namespace, avoid the
  "The namespace () has not been declared" warning, by passing 0 to
  xmlSearchNs() instead of an empty string.
* Build: Fix buildir!=srcdir builds.
* Documentation:
  - Tutorial: Mention pkg-config.
  - Reference: Grammar fixes and a small fix for find().

Changes 2.12.0:
* Added the state "Reading" to xml Reader States list.