relax SVN archive

Bug fix.

This fixes a bug introduced by the changes for task #3838 (https://gna.org/task/?3838). It is also
a partial fix for bug #7544 (https://gna.org/bugs/?7544).

Fixed the parameter convergence test in 'full_analysis.py'.

Bug fix. 'self.relax.generic.structure.read()' was being called when 'read_pdb()' should be.

Changed all the references to the old user function class 'pdb' to 'structure'.

Added a convergence test for the diffusion parameter values to the 'full_analysis.py' script.

Added a function to test for convergence after each round in the 'full_analysis.py' script.

This is in response to the convergence question asked by Sebastien Morin in the post located at
https://mail.gna.org/public/relax-users/2006-11/msg00015.html (Message-id:
<456515E5.6020908@...>).

There are three convergence tests:
Identical chi-squared values.
Identical model-free models.
Identical model-free parameter values.

updates to allow heirachical unit test trees

Execution of both the system/functional tests and unit tests when using the --test-suite option.

Created the file 'test_suite/runner.py' for the execution of all categories of tests
(system/functional and unit tests).

Added an '__init__.py' file to the 'unit_tests' directory to allow import of the modules.

Renamed the file 'test_suite/system_tests/test_suite.py' to 'test_suite/system_tests/main.py'.
More changes will be necessary to remove all references in the system/functional tests to the test
suite.

correct copyright notice

https://mail.gna.org/public/relax-devel/2006-11/msg00176.html

changes to bring code into line with relax code conventions