A suggestion to D commulity 2

[Yonggang Luo]

It's seems that most hard things to geting Phobos and Tango working together is that the "object.d" is different. Because everything is derived from "object.d", so if we want to geting Phobos and Tango working together, we must do a hudge refactoring. But we have to do, because of Phobos and Tango will be larger and larger. And there is such a day, we must geting Phobos and Tango working together, it's be a very hard thing to do. 

And we have another choice, that give up Phobos or Tango, leave one library as the stardard! But i think this would be harder.