Initial try of consolidating configuration files so they can be shared more easily...

Initial try of consolidating configuration files so they can be shared more easily, especially across regression tests and simple examples.

configs/test/fs.py:
    Pull a lot of the default options out of the config file now that they are in the Python objects themselves.  Also merge this file with the single_fs.py, allowing one file to be used for both.  Previously they differed only by the system they instantiated.
configs/test/test.py:
    Initial stab at consolidating configuration files so they aren't redundant between the regression tests and the simple examples.

--HG--
extra : convert_revision : e8ae3de5a6d8864831f21089d4fdb8ec690e4731