add step by step midori128 testing

tests/cryptosystems/midori128stepbystep.rb

+#!/usr/bin/ruby
+
+require 'minitest/autorun'
+
+require_relative "../../cryptosystems/midori128/midori128.rb"
+
+class TestMidori128 < Minitest::Unit::TestCase
+    def test_add_key()
+        # create DAG
+        dag = Midori128_Dag.new()
+        # # simulate behavior
+        output = dag.simulate_behavior(
+            [
+                [0x51,0xe7,0xec,0xbc],
+                [0x08,0x3a,0x87,0x29],
+                [0x4c,0x5c,0xd7,0x75],
+                [0xe6,0xa2,0xba,0x43]
+            ],
+            [
+                [0x68,0x3c,0x5b,0x3e],
+                [0x7d,0x85,0x10,0x2a],
+                [0xed,0xb3,0x09,0x8c],
+                [0x3b,0xf3,0x86,0xbf]
+            ]
+        )
+        assert_equal(output, [
+            0x1e, 0xdf, 0x18, 0xe4, 
+            0x0a, 0xf7, 0x01, 0xaf, 
+            0xc4, 0x1b, 0xb7, 0xc8, 
+            0xfd, 0x4c, 0x3e, 0x3d
+        ])
+    end
+end
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