* py-unxml: Parse xml into python object hierarchy. 
  * Parsing end of XML::Simple for python.
  * usage
    >>> import unxml
    >>> conf=unxml.parse(file('/etc/solr/conf/solrconfig.xml').read())
    >>> conf.keys()
    [u'config']
    >>> conf['config'].keys()
    [u'abortOnConfigurationError', u'updateHandler', u'jmx', u'highlighting', u'requestDispatcher', u'queryResponseWriter', u'mainIndex', u'indexDefaults', u'admin', u'dataDir', u'requestHandler', u'searchComponent', u'query']
    >>> conf['config']['admin'].keys()
    [u'defaultQuery']
    >>> conf['config']['admin']['defaultQuery']
    u'solr'
    >>> 
    * as a command, unxml dumps xml as a pretty json
        $ python unxml.py /etc/solr/conf/solrconfig.xml
        {
            "config": {
                "abortOnConfigurationError": "${solr.abortOnConfigurationError:true}", 
                "updateHandler": {
                    ":class": "solr.DirectUpdateHandler2"
                }, 
        ... 
  * comes with a simple api for transforming the tree.
    * see nt_solr_untype() in examples/unxml_solrconf.py