Pablo.extend() deep does not copy over all properties

[AaronAcerboni]

The deep flag in extend does not fully copy over all properties.

Steps to reproduce:

var obj1 = {
  animal: "dog",
  about: {
    legs: 4
  }
},
obj2 = {
  name: "rex",
  about: {
    attitude: "friendly"
  }
};

var merged = Pablo.extend(obj1, obj2, true);

// Expected object:

{
  animal: "dog",
  name: "rex",
  about: {
    legs: 4,
    attitude: "friendly"
  }
}

// Actual object:

{
  animal: "dog",
  name: "rex",
  about: {
    attitude: "friendly"
  }
}

[premasagar]

It copies over properties in the prototype chain:

function Foo(){}
Foo.prototype = {bar:1};
Pablo.extend({}, new Foo()); // {}
Pablo.extend({}, new Foo(), true); // {bar:1}

[AaronAcerboni]

committed 46d9746