relax SVN archive

Better error handling in the wizard.

The page objects now have a variable exec_status which is only set to True if the protected
execution returns true. The wizard add_page() method now also has an argument called
proceed_on_error which allows the wizard pages to be configured to either remain showing when an
error occurs or to proceed to the next page.

A number of bug fixes for the spectrum.read_intensities() user function.

Merged revisions 13641 via svnmerge from
svn+ssh://bugman@.../svn/relax/1.3

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r13641 | bugman | 2011-07-15 12:25:21 +0200 (Fri, 15 Jul 2011) | 3 lines

Fix for the new relax save state with current pipe info - the cdp ojbect is now set after loading.
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Fix for the new relax save state with current pipe info - the cdp ojbect is now set after loading.

Redesign of the Spectra_list GUI element.

This now initialises to a single row and column, and updates dynamically as spectra are added. The
additional columns displaying the information associated with the spectrum ID are still to be added.

The select.spin and deselect.spin user function menu entires now use the spin icon.

The sequence menu entry is now included in the spin viewer window.

The user function entries are now alphabetically ordered.

Changed the name of the spectra list box.

Clean up of the add_buttons method of Spectra_list. The buttons are also optional.