adding whatsnew notebook into the jupyter tutorial page
adding whatsnew notebook into the jupyter tutorial page

albireox/marvin,albireox/marvin,sdss/marvin,albireox/marvin,sdss/marvin,bretthandrews/marvin,sdss/marvin,albireox/marvin,bretthandrews/marvin,bretthandrews/marvin,bretthandrews/marvin,sdss/marvin