[phobos] User define datetime format

[Jose Armando Garcia]

On Mon, Jun 6, 2011 at 9:35 PM, Jonathan M Davis <jmdavisProg at gmx.com> wrote:
> If you think that you need it for std.log, then I can make it a higher
> priority than I have, but it's not an easy problem. I've been putting it off
> while I get other, more generally useful stuff done with the idea that custom
> date-time formats are really more of a nice-to-have than a necessity.
>

std.log doesn't need strftime anymore. Found it easier to just
implement this myself.