for thread safety under windows
* Add xmlErrorGetString, xmlErrorGetLineNo for syntax error detetction
* Add xmlErrGetNo for detection of, and clearing the last error
* likewise for xmlCopyNode en xmlCompareNode
* add xmlAttributeGetDouble, xmlAttributeGetInt, xmlAttributeGetString
xmlAttributeCopyString and xmlAttributeCompareString functions
* fix some small bugs and problems along the way
* add support for filtering on attribute value in xmlgrep
* fix a problem where the wrong node-name length was returned
* xmlgrep now also works when only the -e options is specified
* fix xmlgrep to show the correct node-name (it reported the parent
node-name in the previous version)
* add the xmlGetNodeName and xmlCopyNodeName functions
* add the xmlCopyString function
* clean up some code
'xmlgrep -v' now returns the proper node name
* rewrite the code to always recursively walk the node tree when searching
for a particular node. this is required for cases where a node with a
particular name is located deeper in a node with the same name;
for example -r /configuration/device/reference/device would fail in the
previous verion
* rename xmlGetElement to xmlGetNodeNum and add the possibility to request
the nth node with this name
* rename xmlGetNumElements to xmlGetNumNodes
The drawback is that this is approach slows down processing the files a bit,
but at least it can now find any xml node in any xml file.
Also, no more function changes are planned from now on.
* depreciate __xmlFindNextElement and use __xmlGetNode instead
* xmlGetNextElement now returns char* instead of void* for furute use
* add preliminary support for wildcards in the search path ('*' and '?')
