add file ordering

[pathikrit]

add file ordering

[pathikrit]

Its actually even shorter in better-files and more powerful. See:

better-files/core/src/main/scala/better/files/File.scala

Lines 604 to 613 in b6e772c

	type Order = Ordering[File]
	object Order {
	val bySize : Order = Ordering.by(_.size)
	val byName : Order = Ordering.by(_.name)
	val byDepth : Order = Ordering.by(_.path.getNameCount)
	val byModificationTime : Order = Ordering.by(_.lastModifiedTime)
	val byDirectoriesLast : Order = Ordering.by(_.isDirectory)
	val byDirectoriesFirst : Order = byDirectoriesLast.reverse
	val default : Order = byDirectoriesFirst
	}

[pathikrit]

Here is the Scaladoc: http://pathikrit.github.io/better-files/latest/api/#better.files.File$$Order$
you can use it like files.sort(File.Order.byName) for example.