title: Scala-xml - XML.loadFile does not preserve attribute order
body: <p>I'm using scala-xml to do some processing on some xml test files. I've noticed that when I read the file with XML.loadFile(file) and then save it back to the test file, the attributes of a node are sorted in ascending order. Is this a bug or is there a way to preserve the original ordering?</p>
  
  <p>I am using "scala-xml" % "1.0.2"
  Thanks!</p>