relax SVN archive

Fix for the relaxation data metadata GUI element for when no relaxation data exists.

The element no longer fails if data is absent.

The relaxation data metadata list GUI element now can stretch to fill the parent, if asked.

This will be used when the list is embedded within a window by itself.

Created a GUI element for displaying and editing the relaxation data metadata.

This is very similar to the relaxation data list GUI element, and it will be used in the BMRB export
(and maybe in a window launchable from the relaxation data GUI element itself).

Refinement of the relax_data.peak_intensity_type user function definition.

Big expansion and improvements of the relax_data.temp_control user function definition.

There are also a few edits of the relax_data.temp_calibration definition.

Created a 200x200 pixel version of the status.weather-clear Oxygen icon.

This is for the relax_data.temp_calibration and relax_data.temp_control user function wizards.

Big expansion and improvements of the relax_data.temp_calibration user function definition.

Improvements for the Force_true object for the 'force flag' user function argument types.

This invisible GUI element can now have its value set. The SetValue() method will internally store
the value, and GetValue() will then return this value. The initial value is True. This allows the
BMRB GUI tests to pass again.

The spin.name and spin.element user functions in the BMRB system and GUI tests now use the force flag.

The flag is set to False. This is to try to replicate the old behaviour of the test and to allow it
to pass again.

Another set of fixes for the bad merge at r16679.

For some reason the branch changes to the generic_fns.align_tensor module had been reverted in the
merger.