[Nickle] Added &&= and ||= support, changed default loading

[Bart Massey]

In message <1134262373.4909.27.camel at evo.keithp.com> you wrote:
> On Sat, 2005-12-10 at 14:29 -0800, Barton C Massey wrote:
> > Coming soon: the much-needed Sort namespace to rollup a
> > bunch of sort code I have lying around.
> 
> There's the sort code in examples; are there other sort routines you'd
> like to add to those?

Yeah, I've got a heapsort lying around somewhere, which IMHO
is the obviously right sort to use by default.  And I want
to work on the interfaces some: we can do better than C,
because we have more expressive power---I think.

    Bart