Actually implement reading byte_arrays

apps/amethyst/lib/data.ex

@@ -216,6 +216,11 @@ defmodule Amethyst.Minecraft.Read do
     {[data | acc], rest, :reversed}
   end
 
+  def byte_array({acc, data, :reversed}) do
+    {[length], rest} = start(data) |> varint |> stop
+    raw({acc, rest, :reversed}, length)
+  end
+
   @doc """
   Reads a varint. `read` tracks the number of bytes read and `nacc` tracks the number being read.
   """