this function is backwards; DBQueryFatal() should call DBQuery(), not
the other way around!

Remove some debugging stuff that broke the library. Kirk can add it
back later when he decides what to do.

* Changed the way options are parsed in the python scripts so that modules
  can easily add and use their own options independent of top-level scripts.

* Added --noIS and --pollNodes module options.

* Added batch option to vnode_setup (degree of parallelization)
  - defaults to 10

* Major updates to plamonitord
  - batches testing, currently to 40

remove debugging flag from libdb.py

I'll come along for a closer cut in the future.

* Modularized the plab communications 'adaptor' interface and moved the
  dslice- and PLC-specific code into their own modules.

* Wrote an API definition README

* Separated out generic routines from libplab into their own library modules
  (libtestbed.py and libdb.py)

Functionally, not much has changed - this was just a massive re-org with some
other cleanup.  Should be much easier to code up new PLAB interfaces as the
plab folks flail around in their attempt to standardize on something.

XXX: may want to re-think where the generic library modules should go.  If
more python code enters Elab, we'll probably want to move 'em to more standard
locations.

This isn't the end of the cleanup - I would eventually like to go back and
rethink the class structures, beef up the comments, and extend the API.