Fixing the API of std.regex

[Andrej Mitrovic]

On 3/12/13, Dmitry Olshansky <dmitry.olsh at gmail.com> wrote:
> struct match //ditto  for replace
> {
> 	//current behavior
> 	static auto opCall(.....);
> }

For a second I was worried this would break UFCS, but actually it
still works. Pretty kewl.