compo call replaceFilter on children
compo call replaceFilter on children

it's still the wrong model, but calling filter twice
compounds the problem
for workaround for #479

dc-js/dc.js,mtraynham/dc.js,aaronhoffman/dc.js,ruhley/dc.js,Hauenstein/dc.js,ruhley/dc.js,ruhley/dc.js,aaronhoffman/dc.js,TheDataShed/dc.js,dc-js/dc.js,aaronhoffman/dc.js,TheDataShed/dc.js,mtraynham/dc.js,TheDataShed/dc.js,ruhley/dc.js,dc-js/dc.js,TheDataShed/dc.js,mtraynham/dc.js,dc-js/dc.js,Hauenstein/dc.js,dc-js/dc.js,aaronhoffman/dc.js,Hauenstein/dc.js,TheDataShed/dc.js,Hauenstein/dc.js,aaronhoffman/dc.js,ruhley/dc.js,mtraynham/dc.js,mtraynham/dc.js,Hauenstein/dc.js