relax SVN archive

The analysis spin control GUI element now sets the default value.

This used to set the value, but for some reason no longer did this.

All pages of the Rx peak list wizard now cannot proceed on an error.

This will trigger the user function flushing.

A copy of the GUI interpreter singleton is now initialised in the wizard.

This is used for the flushing of user functions prior to proceeding.

The GUI interpreter object has been converted into a singleton.

Fix for the Rx peak height wizard, the user function flush flag was incorrectly named.

Fix for the wizard page _ok() method for the uf_flush flag.

The flush flag is set for the first page of the Rx peak height loading wizard.

Added the ability to flush the GUI interpreter thread in the wizard prior to changing to the next page.

This will help in solving races when a series of user functions are strung one after the other.

The relax controller is no longer shown every time a print out occurs.

This window was appearing far too often causing too much window clutter.

The notification of observers in status.observers.gui_uf has been modified.

The GUI user function pages no longer perform this as the calls to the interpreter are via the
interpreter thread, hence the completion of the page does not signal the completion of the user
function. Instead the interpreter thread (and the synchronous apply() call as well) perform the
notification once complete.