Rename StaticRing<> to Ring<>.  Move Ring tests to job01/core/tests.
Move Padding test to job01/core/tests.
Add convenient CacheLine subclass of Padding.
Playing around with memory subsystem while writers-blocking on schwa::job.
Improve comments in various places throughout code,
including meta-comments such as TODO, EXPERIMENTAL, etc.

Sketch of Worker and Boss.

Solid-looking implementation of JobQueue... next, time to test it!
Rename file to jobqueue.h

Rename RingElement::index() to ringIndex()... should do this for rest of API.

Add host/host.h for values such as # of CPUs, etc.
Add additional template parameter to Link<> to specify how it points
to the next Link.  The default is the old behavior: use LinkT*.
Pretty darn good first attempt at job01::core::Pool.  Current top priority
is continued refinement.

Minor tweaks to JobQueue (safer static checks, better comments, etc.)

Ditto for Link and several job01::core tests.

Placeholder for SCHWASSERT_LOCKED().