Added IrTypeFunction and IrTypeDelegate and eliminated IrDType. This means the Type::ir field can be removed. It's the final part needed for the move to a slightly more sane type system. Now the whole thing just needs to be cleaned up :P Added -v-cg switch, which right now just prints "codegen: module.name (module/name.d)" to stdout, this can really help figuring out where, in some complex build command, things go wrong.

int foo()
{
    static size_t fourty2 = 42;
    version(X86)
    asm
    {
        naked;
        mov EAX, fourty2;
        ret;
    }
    else version (X86_64)
    {
      asm
      {
	naked;
	movq RAX,fourty2;
	ret;
      }
    }
    else static assert(0, "todo");
}

void main()
{
    int i = foo();
    printf("i == %d\n", i);
    assert(i == 42);
}

extern(C) int printf(char*, ...);