rename method_compiler

in line with other compiler XX_Compiler being the compiler for that layer
remove type from compiler as it is in method available

test/risc/test_builder.rb

@@ -6,7 +6,7 @@ module Risc
     def setup
       Risc.machine.boot
       init = Parfait.object_space.get_init
-      @builder = Risc::MethodCompiler.new( init ).code_builder(init)
+      @builder = Risc::RiscCompiler.new( init ).code_builder(init)
       @label = Risc.label("source","name")
     end
     def test_has_build
@@ -102,7 +102,7 @@ module Risc
     def setup
       Risc.machine.boot
       @init = Parfait.object_space.get_init
-      @builder = Risc::MethodCompiler.new( @init ).compiler_builder(@init)
+      @builder = Risc::RiscCompiler.new( @init ).compiler_builder(@init)
     end
     def test_inserts_built
       r1 = RegisterValue.new(:r1 , :Space)

test/risc/test_risc_compiler.rb

@@ -1,7 +1,7 @@
 require_relative "helper"
 
 module Vool
-  class TestMethodCompiler < MiniTest::Test
+  class TestRiscCompiler < MiniTest::Test
     include CompilerHelper
 
     def setup

test/vool/compilers/helper.rb

@@ -1 +0,0 @@
-require_relative "../helper"