TODO
* Rename _read() functions to _read_data()
** libfwevt_manifest_read
** libfwevt_template_read
** libfwevt_xml_document_read
* Remove deprecated libfwevt_xml_document_clone, previously used by libevtx
* Remove deprecated libfwevt_manifest_get_provider, previously used by libwrc
* Expose libfwevt_xml_tag_free

20140928
* see `git log' for more recent change log
* Created stand-alone version of version used in libevt

