relax SVN archive

Bug fix for the spectrum.read_intensities int_method argument for volumes.

Volume integration should be called 'point sum', but the back end code was checking against the
string 'volume'.

Fixes for the user function page setups in the NOE GUI test.

The column widths of the Spectrum_list GUI element are now set on resize and when updated.

This was previously only set on a resize.

Fix for the page skipping functionality in the wizard - all pages were being skipped!!!

Created the wizard get_page() method for obtaining a page based on its index.

Created a wizard page method on_display_post() for execution directly after on_display().

The wizard _go_next() method can now handle not having a next page - the _ok() method is now applied.

Added the skip button to most pages of the NOE peak intensity wizard.

Added the infrastructure for a skip button in the wizard.

Set the skip icon to be arrow-right-double-relax-blue.