accept @pure @nothrow @return attributes

[Walter Bright via Digitalmars-d]

On 1/26/2015 1:29 PM, Dicebot wrote:
> However my complaint is not about the change itself (though I personally
> disagree with Don reasoning in that issue, it is a delicate matter) but about
> the fact that it is again done as a casual PR and our breaking change culture
> does not seem to change : it is still all or nothing approach. No automatic
> migration tools, no easily found rationale / explanation, no posts in D.announce
> - just an ordinary commit. No wonder any of more notable change is considered
> that scary.

What I wanted by doing this is to produce some sort of consensus. The topic has 
already been discussed to death.