move function call instruction to register level and the pass to arm

lib/register/instructions/function_call.rb

@@ -0,0 +1,12 @@
+module Register
+  # name says it all really
+  # only arg is the method object we want to call
+  # assembly takes care of the rest (ie getting the address)
+
+  class FunctionCall < Instruction
+    def initialize method
+      @method = method
+    end
+    attr_reader :method
+  end
+end

lib/virtual/instructions/messaging.rb

@@ -18,11 +18,4 @@ module Virtual
     attr_reader :name , :me ,  :args
   end
 
-  class FunctionCall < Instruction
-    def initialize method
-      @method = method
-    end
-    attr_reader :method
-  end
-
 end