Expanding Phobos from a flat hierachy

[Walter Bright]

On 2/6/2013 12:15 AM, Jonathan M Davis wrote:
 > I don't think that it's generally worth trying to rearrange
 > the modules that we already have. So, adding std.halffloat would be bad, but I'm
 > not sure that it's worth doing something like moving std.uri into std.net.
 > Even if we did, we'd be forced to leave std.uri around for quite some time

At least the contents of std.uri can be nothing more than:

   module std.uri;
   public import std.net.uri;