relax SVN archive

Renamed all of the relaxation curve-fitting target functions.

This includes all of the C functions which are model specific, by appending '_exp' to the current
names to now be func_exp, dfunc_exp, d2func_exp, jacobian_exp, and jacobian_chi2_exp. And all of
the Relax_fit_opt target function class *_wrapper() methods to *_exp(). The target function class
is now only aliasing the *_exp() methods when the model is set to 'exp'.

Small fix for the relax_fit.select_model user function.

The exponential model name is now being passed into the target function class.

The model as specified by the relax_fit.select_model user function is now finally being sent into
the target function, in this case the Relax_fit_opt class in target_functions.relax_fit_wrapper.

Fix for the relax_fit.select_model user function backend for the 'sat' model.

Modified the Relax_fit.test_saturation_recovery system test script.

The relax_fit.select_model user function call now selects the 'sat' model.

Added the saturation recovery experiment to the relax_fit.select_model user function.

This simply adds a new option and sets up a different parameter set [Rx, Iinf].

Created the Relax_fit.test_saturation_recovery system test.

This follows from the discussion of
http://thread.gmane.org/gmane.science.nmr.relax.devel/7308/focus=7369.

Added a copyright notice for Andras Boeszoermenyi for the newly added saturation-recovery R1 script.

This change follows the discussion in the message
http://thread.gmane.org/gmane.science.nmr.relax.devel/7308/focus=7369.

Reverted r26820 as this was incorrect.

The command used was:
svn merge -r26820:r26819 .

Modified the relax_fit_saturation_recovery.py script to work as a system test.

This is the script from Andras Boeszoermenyi <Andras_Boeszoermenyi att hms dott harvard dot edu>.
The change follows from the discussion of
http://thread.gmane.org/gmane.science.nmr.relax.devel/7308/focus=7369.

The status.install_path variable is now used to point to the location of the files. The relax data
store ds.tmpdir variable is used for outputting all files. And commented out user functions have
been deleted.