Splitting std.algorithm

[Steven Schveighoffer via Digitalmars-d]

On 1/21/15 12:03 AM, Jonathan M Davis via Digitalmars-d wrote:
> It's large
> enough that github won't display the whole thing, and it's far larger than
> any other module in Phobos.

This is the only reason I think we need to split it :) Doing reviews on 
std.datetime PRs are painful.

-Steve