relax SVN archive

The RAM in the relax information printout is now displayed for Mac OS X.

The 'sysctl' command is now being used to retrieve the RAM size and total memory, and the swap is
calculated as the difference.

Fix for bug #21763 (https://gna.org/bugs/?21763).

This is the problem of the chi2 value not being visible in the parameter list of the grace.write and
value.write user functions in the GUI.

The problem was that when asking for the parameter name list, the minimisation parameters were not
being asked for.

Fix for the relax information printout on Mac OS X.

Removed the dependence on subprocess.check_output() as this is only for Python 2.7 and higher.

This is for the relax information printout about the CPU info recently introduced.

The relax information printout, from "relax -i" for example, now includes detailed CPU information.

This uses operating system specific commands to obtain this information which is not available from
the platform Python module.

Imported return_param_key_from_data to be used in unit test return_offset_data.

Regarding sr #3124, (https://gna.org/support/index.php?3124) - Grace graphs production for R1rho analysis with R2_eff as function of Omega_eff.

Commented out the expectation of the attribute "theta" to exist in systemtest Relax_disp.test_r1rho_kjaergaard.

Regarding sr #3124, (https://gna.org/support/index.php?3124) - Grace graphs production for R1rho analysis with R2_eff as function of Omega_eff.

Added unit test for return_offset_data.

Regarding sr #3124, (https://gna.org/support/index.php?3124) - Grace graphs production for R1rho analysis with R2_eff as function of Omega_eff.

This is development according to thread http://thread.gmane.org/gmane.science.nmr.relax.devel/5157.

Removed the writiung of test file to home folder in systemtest Relax_disp.test_r1rho_kjaergaard.

Regarding sr #3124, (https://gna.org/support/index.php?3124) - Grace graphs production for R1rho analysis with R2_eff as function of Omega_eff.

Made an assertion that spin contains attribute "theta" in systemtest Relax_disp.test_r1rho_kjaergaard.

Regarding sr #3124, (https://gna.org/support/index.php?3124) - Grace graphs production for R1rho analysis with R2_eff as function of Omega_eff.