pugixml: new package

pugixml: new package

pugixml is a light-weight C++ XML processing library. It features:
* DOM-like interface with rich traversal/modification capabilities
* Extremely fast non-validating XML parser which constructs the DOM tree from an XML file/buffer
* XPath 1.0 implementation for complex data-driven tree queries
* Full Unicode support with Unicode interface variants and automatic encoding conversions

Homepage: http://pugixml.org/
Repository: https://github.com/zeux/pugixml

Signed-off-by: Theo Debrouwere <t.debrouwere@televic.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>