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.
