Add block_reduce and block_replicate to CHANGES.rst
Add block_reduce and block_replicate to CHANGES.rst

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