This is the internal interface to the performance database.

It's a very rough draft at this stage;  I hesitate to say
that it's particularly useful except for playing with the
interfaces.  It needs delete and housekeeping functions to
actually be useful;  I'll add those in the next few days.

System Requirements
-------------------

pdb requires db3 from sleepycat software to be installed on
your machine.  At present, it's hardcoded to look for it
in /usr/local/lib.  Eventually, this will be autoconf'd.

A good C++ compiler is a nice thing.  Tested under g++ 2.95.2

