Author: Jim Teeuwen <jimteeuwen@gmail.com>

 This package wraps the standard XML library and uses it to build a node tree of
 any document you load. This allows you to look up nodes forwards and backwards,
 as well as perform search queries (no xpath support yet).

 Nodes now simply become collections and don't require you to read them in the
 order in which the xml.Parser finds them.

 xmlx.Document implements both these interfaces:
 
	type ILoader interface {
		LoadFile(string) os.Error;
		LoadString(string) os.Error;
		LoadStream(*io.Reader) os.Error;
	}

	type ISaver interface {
		SaveFile(string) os.Error;
		SaveString(string) (string, os.Error);
		SaveStream(*io.Writer) os.Error;
	}

 This allows you to load/save xml data to and from pretty much any source.

 The Document currently implements 2 simple search functions which allow you to
 look for specific nodes.
 
   Document.SelectNode(namespace, name string) *Node;
   Document.SelectNodes(namespace, name string) []*Node;
 
 SelectNode() returns the first, single node it finds matching the given name
 and namespace. SelectNodes() returns a slice containing all the matching nodes.
 
 Note that these search functions can be invoked on individual nodes as well.
 This allows you to search only a subset of the entire document.