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

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.

Reduce number of style-warning through re-ordering of dependencies.

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