rename register to risc

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

test/risc/interpreter/helper.rb

@@ -0,0 +1,23 @@
+require_relative "../helper"
+require "risc/interpreter"
+
+module Risc
+  module Ticker
+    include AST::Sexp
+    include InterpreterHelpers
+
+    def setup
+      Risc.machine.boot
+      do_clean_compile
+      Vm.compile_ast( @input )
+      Collector.collect_space
+      @interpreter = Interpreter.new
+      @interpreter.start Risc.machine.init
+    end
+
+    # must be after boot, but before main compile, to define method
+    def do_clean_compile
+    end
+
+  end
+end