rename register to risc

seems to fit the layer much better as we really have a very reduced
instruction set

test/risc/test_machine.rb

@@ -0,0 +1,18 @@
+require_relative "../helper"
+
+module Risc
+  class TestMachine < MiniTest::Test
+
+    def setup
+      @machine = Risc.machine.boot
+    end
+
+    def test_collect_all_types
+      objects = Risc::Collector.collect_space
+      objects.each do |id, objekt|
+        next unless objekt.is_a?( Parfait::Type )
+        assert Parfait.object_space.get_type_for( objekt.hash ) , objekt.hash
+      end
+    end
+  end
+end