add convinience methods to compute L and H functions
add convinience methods to compute L and H functions

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