New std.range submodule

[Nick Treleaven via Digitalmars-d]

On 14/11/2014 21:52, David Nadlinger wrote:
> On Friday, 14 November 2014 at 06:10:43 UTC, Rikki Cattermole wrote:
>> std.range.checks
>
> For this, std.range.constraints would also be perfectly fine.

If it's not too late, can we change the name to std.range.traits? It 
seems better as they can be used in 'static if', not just for template 
constraints. Plus it's shorter and consistent with std.traits naming.