dmd 1.046 and 2.031 releases

[grauzone]

> In any way, I think we should completely redesign the switch statement 
> and give it a different syntax. No more C compatibility. No more Duff's 
> device. We can keep the "old" switch statement for that.

PS: we could add awesome stuff like pattern matching to this, which 
would make D much more functional language like, which seems to be the 
new cool thing to do. We can also omit case labels completely, which 
will reduce repeated typing of keywords.