[gdome]Right implementation for DocumentFragment

[Paolo Casarini <casarini CS UniBO IT>]

Now some methods in GdomeNode implementation have the right behavior when
the node is a XML_DOCUMENT_FRAG_NODE (appendChild, insertBefore and
replaceChild).

I've added a new no standard method in DOMImplemtation interface
to allow to free the libxml tree (freeDoc method).

I've added a new test program (test-node) to debug all attributes and
methods of the GdomeNode interface (produce the file output.xml to test
some methods).

Next Tasks:
- Verify and complete CharacterData, Text and Comment Interfaces
- Implement specific test programs for Element, Attribute, Nodelist and
NamedNodeMap interfaces.

Scheduled date for the next commit: 03/11/2001

Bye
Paolo
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Paolo Casarini - casarini cs unibo it