relax SVN archive

The auto_analyses package modules are now imported by __init__ to force their existence.

The reference counting appears to not be needed in the C modules.

This allows the modules to be compiled under Python 2.4 or lower.

Scripts can now be run again under Python versions 2.4 or lower.

Fix for the initialisation of the Bruker_import class.

This allows this module to be loaded in Python 2.4.

The runpy module is only imported if it exists.

Added a check for the runpy module.

Fix for the back_calc_I C function so that it works under Python 2.5.

Added wrapper methods to the relaxation curve-fitting specific code for the new C modules.

These allow the parameter numpy array from minfx to be converted into a Python list prior to sending
it into the C module.

Removed numpy from the relaxation curve-fitting C module code.

This now expects Python lists as arguments. This should help with incompatibilities between
different Python versions, as this seems to be due to the numpy C interface. See for example
the thread started by Min-Kyu <min-kyu dott cho att vanderbilt dot edu>
https://mail.gna.org/public/relax-users/2011-02/msg00000.html (Message-id:
<001f01cbd24f$350042d0$9f00c870$@cho@...>).

Decreased the accuracy of the PDC reading system test, as the PDC data is not accurate to 7 places.