Refactoring tool feature requests

• Explicit xo4a: flag everywhere that anonymous functions mention this and make the user choose the translation that captures his intention.
• Packaged contructors: rewrite the pattern

pkg.Foo = function Foo(x) { this.x_ = x; };
pkg.Foo.prototype.getX = function() { return this.x_; };

into

(function () {
  function Foo(x) { this.x_ = x; }
  Foo.prototype.getX = function() { return this.x_; };
  pkg.Foo = Foo;
})();