move machine to module level

makes for shorter, more concise, access
also remove one more bug possibility
(reinitiation)

lib/register/builtin/kernel.rb

@@ -8,7 +8,7 @@ module Builtin
         function = Virtual::CompiledMethodInfo.create_method(:Kernel,:__init__ , [])
 #        puts "INIT LAYOUT #{function.get_layout.get_layout}"
         function.info.return_type = Virtual::Integer
-        main = Virtual::Machine.instance.space.get_main
+        main = Virtual.machine.space.get_main
         me = Virtual::Self.new(Virtual::Reference)
         code = Virtual::Set.new(Virtual::Self.new(me.type), me)
         function.info.add_code(code)

lib/register/builtin/object.rb

@@ -23,7 +23,7 @@ module Builtin
         var_name = get_function.args.first
         return_to = get_function.return_type
 
-        index_function = ::Virtual::Machine.instance.space.get_class_by_name(:Object).resolve_method(:index_of)
+        index_function = ::Virtual.machine.space.get_class_by_name(:Object).resolve_method(:index_of)
 #        get_function.push( [me] )
 #        index = get_function.call( index_function )
 

lib/register/passes/call_implementation.rb

@@ -23,5 +23,5 @@ module Register
       end
     end
   end
-  Virtual::Machine.instance.add_pass "Register::CallImplementation"
+  Virtual.machine.add_pass "Register::CallImplementation"
 end

lib/register/passes/return_implementation.rb

@@ -18,5 +18,5 @@ module Register
       end
     end
   end
-  Virtual::Machine.instance.add_pass "Register::ReturnImplementation"
+  Virtual.machine.add_pass "Register::ReturnImplementation"
 end

lib/register/passes/set_implementation.rb

@@ -42,5 +42,5 @@ module Register
       end
     end
   end
-  Virtual::Machine.instance.add_pass "Register::SetImplementation"
+  Virtual.machine.add_pass "Register::SetImplementation"
 end