relax SVN archive

Fixes for the auto NOE analysis GUI test.

Fix for the get_page_from_name() method - the page is now returned rather than relax data store object.

The analysis page list structure is now private.

Fix for the Analysis_controller.delete_analysis() method for when the last page is deleted.

The gui methods are now called properly and the switch to the previous page is not attempted.

Created a new menu item 'File->Close all analyses'.

This closes all analyses and resets the relax data store.

Added the dialog-close oxygen icon to the paths module.

Added the 16x16 and 48x48 versions of the dialog-close oxygen icon.

Missing import.

The notebook switches to the previous page if the current one is deleted now.

The notebook will now switch to a newly added analysis.