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.

void main()
{
  static int[] b = [1, 2];
  b[0] = 2;
  
  typedef int[] ia = [1,2];
  static ia a;
  a[0] = 5;
}