Adding Scaladocs to DigitalHex

n2s3/src/main/scala/fr/univ_lille/cristal/emeraude/n2s3/features/io/input/DigitalHexInputStream.scala

 package fr.univ_lille.cristal.emeraude.n2s3.features.io.input
 
 /**
-  * Created by falezp on 19/04/16.
+  * Factory for [[DigitalHexInputStream]].
   */
-
 object DigitalHexEntry {
 
   def apply() = new StreamEntry[SampleInput](Shape(3, 5))
 }
 
+/**
+  * An input stream that generates hexadecimal chars in a 3x5 picture of binary pixels.
+  * This stream is generated in memory.
+  */
 class DigitalHexInputStream extends N2S3InputStream[SampleInput] {