Multiple modifications.  Software is now in a fragile state

- Started adding documentation via TINAA
- Renamed several functions, and removed many slot accessors
as these slots are private
- Changed interface to some functions, added new accessor functions.

See ChangeLog file
Fixed remaining errors, all tests pass

I can now resume improving the user interface, adding
documentation, and providing a test example
Added COPYRIGHT

I am using the MIT license obtained from opensource.org/licenses/MIT
Added basic table read and examples.  Expanded matching functions ability
Added least-squares fitting, and other minor fixes

See ChangeLog file
New class structure for column-schema

All tests pass.  Next tasks are
- ensure table building works for foreign-column
- ensure tablel selection works for foreign-column
Adapted to handle foreign arrays

All tests pass.  Handling of foreign arrays lightly tested.  Still need to test table queries with foreign arrays