Added union(), intersection(), ancestor(), ancestorOrSelf(), descendant(), and descendantOrSelf()
Added union(), intersection(), ancestor(), ancestorOrSelf(), descendant(), and
descendantOrSelf()

corinthia/corinthia-editorlib,corinthia/corinthia-editor,corinthia/corinthia-editor,corinthia/corinthia-editorlib,corinthia/corinthia-editor,corinthia/corinthia-editorlib,corinthia/corinthia-editorlib,corinthia/corinthia-editor,corinthia/corinthia-editorlib,corinthia/corinthia-editor