relax SVN archive

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.

Created relax blue versions of the arrow-right-double oxygen icons.

Added the arrow-right-double oxygen icons.

Changed the order of the integration method and column in the GUI element.

Updates to the spectrum.read_intensities user function and an argument order change.

Update to the spin.element user function docstring.