return a dictionary of statistics about an 
    XML file including size in bytes, num lines,
    number of elements, count by elements

def get_xml_stats(fname):
    """
    return a dictionary of statistics about an 
    XML file including size in bytes, num lines,
    number of elements, count by elements
    """
    f = mod_file.TextFile(fname)
    res = {}
    res['shortname'] = f.name
    res['folder'] = f.path
    res['filesize'] = str(f.size) + ' bytes'
    res['num_lines'] = str(f.lines) + ' lines'
    res['date_modified'] = f.GetDateAsString(f.date_modified)
    
    return res