Don't normalize away last component in a component name that has dots.

* Load-source-op planning is broken, especially in how it trickles to
 other systems you depend on. Use load-op for planning, but have it
 perform like load-source-op on our instrumented files.
* Fix :conc-name nil in defstruct

2- suppress style-warnings due to the use of some variables being commented out

  - Added instrumentation for #. and #S
  - Potentially dangerous heuristics for defvar and defconstant
  - Improved handler for defstruct
  - New unit tests
  - Some cleanup of old code

(changes actually by fare)

Constituents allow for more control over how dependencies are reported.  Each
constituent can depend on other constituents, but can also have subconstituents
with finer-grained dependencies.

Plenty of cleanup and reorganization still to be done.

 * Better recognition of just about everything.
 * Lots of bug fixes.
 * Make it easier to drop in user-provided handler definitions in the
   handlers/ directory.