relax SVN archive

Bug fix for the resetting of the relax data store - the cdp structure is now set to None.

Previously the data store would be cleared, but the __builtin__.cdp structure would point to the old
current data pipe, keeping it in existence.

Improvements to the setting of the relax controller gauges on startup and finishing an auto-anlaysis.

Warning dialogs are shown if the pipe editor or spin viewer windows are opened during the exec lock.

The close_windows() method exists without doing anything if the windows are not opened.

All wx events are now flushed with a wx.Yield() call prior to the data and interface checks.

The relax controller gauges are now checked in the NOE and Rx auto-analysis GUI tests as well.

Improvements to the user warning dialog about closing windows.

The dialog is now only shown once at the start and it blocks the auto-analysis.

The relax data store from_xml() file no longer notifies the observers of pipe alterations.

When the pipe_to argument is supplied, this method does not alter the data pipes but simply fills
the pre-existing one. This is called by generic_fns.state.load() and generic_fns.results.read(),
both of which can handle the necessary observer notifications.

Added a message dialog to warn the user to close the spin viewer and pipe editor windows to speed up calcs.

The relax controller progress gauges are now tested in the model-free auto-analysis GUI test.

The should all be set to 100 upon completion.