add ipython to intersphinx for what's new show_in_notebook
add ipython to intersphinx for what's new show_in_notebook

bsipocz/astropy,saimn/astropy,aleksandr-bakanov/astropy,pllim/astropy,saimn/astropy,joergdietrich/astropy,lpsinger/astropy,DougBurke/astropy,dhomeier/astropy,StuartLittlefair/astropy,stargaser/astropy,aleksandr-bakanov/astropy,DougBurke/astropy,astropy/astropy,StuartLittlefair/astropy,dhomeier/astropy,kelle/astropy,tbabej/astropy,MSeifert04/astropy,MSeifert04/astropy,kelle/astropy,MSeifert04/astropy,lpsinger/astropy,larrybradley/astropy,larrybradley/astropy,pllim/astropy,stargaser/astropy,pllim/astropy,mhvk/astropy,dhomeier/astropy,funbaker/astropy,aleksandr-bakanov/astropy,StuartLittlefair/astropy,funbaker/astropy,joergdietrich/astropy,joergdietrich/astropy,AustereCuriosity/astropy,saimn/astropy,StuartLittlefair/astropy,astropy/astropy,dhomeier/astropy,stargaser/astropy,tbabej/astropy,dhomeier/astropy,astropy/astropy,funbaker/astropy,AustereCuriosity/astropy,tbabej/astropy,lpsinger/astropy,astropy/astropy,mhvk/astropy,DougBurke/astropy,AustereCuriosity/astropy,bsipocz/astropy,larrybradley/astropy,tbabej/astropy,AustereCuriosity/astropy,kelle/astropy,larrybradley/astropy,stargaser/astropy,lpsinger/astropy,funbaker/astropy,StuartLittlefair/astropy,pllim/astropy,larrybradley/astropy,saimn/astropy,bsipocz/astropy,pllim/astropy,mhvk/astropy,joergdietrich/astropy,mhvk/astropy,bsipocz/astropy,lpsinger/astropy,joergdietrich/astropy,aleksandr-bakanov/astropy,mhvk/astropy,astropy/astropy,AustereCuriosity/astropy,MSeifert04/astropy,DougBurke/astropy,tbabej/astropy,kelle/astropy,kelle/astropy,saimn/astropy