Copy risc compiler stuff to mom

Start to separate the layers. 
wip, just checkin in to see the following changes better

lib/risc/builder.rb

@@ -4,6 +4,12 @@ module Risc
   #
   # The code is added to the method_compiler.
   #
+  # Basically this allows to many Risc instructions with extremely readable code.
+  # example:
+  #  space << Parfait.object_space # load constant
+  #  message[:receiver] << space  #make current message's (r0) receiver the space
+  # See http://ruby-x.org/rubyx/builder.html for details
+  # 
   class Builder
 
     attr_reader :built , :compiler

lib/risc/method_compiler.rb

@@ -1,8 +1,7 @@
 module Risc
 
-  # MethodCompiler (old name) is used to generate risc instructions for methods
-  # and to instantiate the methods correctly. Most of the init is typed layer stuff,
-  # but there is some logic too.
+  # MethodCompiler is used to generate risc instructions for methods
+  # and to instantiate the methods correctly.
 
   class MethodCompiler < CallableCompiler