If/else -> match

Before:

    override def endElement(uri: String, localName: String, name: String) =
      if (name == "v")
        endVElement(uri, localName, name)
      else if (name == "row") {
        output = seenCells.reverse :: output
        seenCells = Nil
      }

After:

    override def endElement(uri: String, localName: String, name: String) = name match {
      case "v" =>
        endVElement(uri, localName, name)
      case "row" => {
        output = seenCells.reverse :: output
        seenCells = Nil
      }
    }