relax SVN archive

Converted the user function exec_info object to be private.

This was bad in 2 ways, it was visible to the user and it was killing the fetch_docstring.py script.

Fix for the docstring fetching script.

The relax prompt interface is no longer run as the user functions are directly located in the
_locals private dictionary.

Improvements to the handling of the PyMOL Python packages.

The methods have been alphabetically ordered as well.

Renamed the pymol modules to pymol_control in the __all__ lists and unit tests.

Fixed the auto_analyses.relax_fit reversions so that the bieri_gui branch is still viable.

The commands used were:
[edward@... bieri_gui]$ svn merge -r10993:10992 .
--- Reverse-merging r10993 into '.':
U auto_analyses/relax_fit.py
[edward@... bieri_gui]$ svn merge -r10960:10959 .
--- Reverse-merging r10960 into '.':
G auto_analyses/relax_fit.py
[edward@... bieri_gui]$ svn merge -r10936:10922 .
--- Reverse-merging r10936 through r10923 into '.':
G auto_analyses/relax_fit.py

This reverts, in reverse order: r10923 to r10936; r10960, the first attempt at reverting; and
r10993, the attempt at fixing the damage of r10960. The auto_analyses/relax_fit.py is now
identical to that of the 1.3 line, and the branch should be mergeable after the other modules of
auto_analyses have been reverted. This branch reparation still needs to be checked!

More fixes for the install path change to __main__.install_path.

Fixes for the renaming of the pymol modules to pymol_control.

Copied the relax installation path into __main__.install_path.

The import of the PyMOL clobbered sys.path!!! Therefore relax does not touch this array any more.
Instead __main__.install_path is used to store where relax is installed. This should avoid all
problems with sys.path.

Redesigned the ImportErrorTestCase class so that the test failure clearly explains what went wrong.

The traceback is now stored and later printed, the exception is not passed in, rather strings with
the module name and traceback, and comments and docstrings have been added.

Unused code for NOE and Rx calculation was removed.