make method creation class methods in MethodCompiler

and pass the wish to use main explicitly, which is really a test
feature

lib/register/builtin/compile_helper.rb

@@ -11,7 +11,7 @@ module Register
 
       def compiler_for( type , method_name , extra_args = {})
         args = {:index => :Integer}.merge( extra_args )
-        Vm::MethodCompiler.new.create_method(type , method_name , args ).init_method
+        Vm::MethodCompiler.create_method(type , method_name , args ).init_method
       end
 
       # Load the value

lib/register/builtin/integer.rb

@@ -6,18 +6,18 @@ module Register
         include AST::Sexp
 
         def mod4 context
-          compiler = Vm::MethodCompiler.new.create_method(:Integer,:mod4 ).init_method
+          compiler = Vm::MethodCompiler.create_method(:Integer,:mod4 ).init_method
           return compiler.method
         end
         def putint context
-          compiler = Vm::MethodCompiler.new.create_method(:Integer,:putint ).init_method
+          compiler = Vm::MethodCompiler.create_method(:Integer,:putint ).init_method
           return compiler.method
         end
 
 
         def div10 context
           s = "div_10"
-          compiler = Vm::MethodCompiler.new.create_method(:Integer,:div10 ).init_method
+          compiler = Vm::MethodCompiler.create_method(:Integer,:div10 ).init_method
           me = compiler.process( Vm::Tree::KnownName.new( :self) )
           tmp = compiler.process( Vm::Tree::KnownName.new( :self) )
           q = compiler.process( Vm::Tree::KnownName.new( :self) )

lib/register/builtin/kernel.rb

@@ -6,7 +6,7 @@ module Register
         # it isn't really a function, ie it is jumped to (not called), exits and may not return
         # so it is responsible for initial setup
         def __init__ context
-          compiler = Vm::MethodCompiler.new.create_method(:Kernel,:__init__ )
+          compiler = Vm::MethodCompiler.create_method(:Kernel,:__init__ )
           new_start = Register.label("__init__ start" , "__init__" )
           compiler.method.set_instructions( new_start)
           compiler.set_current new_start
@@ -29,7 +29,7 @@ module Register
         end
 
         def exit context
-          compiler = Vm::MethodCompiler.new.create_method(:Kernel,:exit ).init_method
+          compiler = Vm::MethodCompiler.create_method(:Kernel,:exit ).init_method
           emit_syscall( compiler , :exit )
           return compiler.method
         end

lib/register/builtin/space.rb

@@ -9,7 +9,7 @@ module Register
         # main entry point, ie __init__ calls this
         # defined here as empty, to be redefined
         def main context
-          compiler = Vm::MethodCompiler.new.create_method(:Space , :main ).init_method
+          compiler = Vm::MethodCompiler.create_method(:Space , :main ).init_method
           return compiler.method
         end
 

lib/register/builtin/word.rb

@@ -7,7 +7,7 @@ module Register
         include CompileHelper
 
         def putstring context
-          compiler = Vm::MethodCompiler.new.create_method(:Word , :putstring ).init_method
+          compiler = Vm::MethodCompiler.create_method(:Word , :putstring ).init_method
           compiler.add_slot_to_reg( "putstring" , :message , :receiver , :new_message )
           index = Parfait::Word.get_length_index
           reg = RegisterValue.new(:r2 , :Integer)