Add docs for the jsviewer writer
Add docs for the jsviewer writer

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