fix warning, add docs
fix warning, add docs

utdemir/wai,dylex/wai,ygale/wai,rgrinberg/wai,tolysz/wai,AndrewRademacher/wai,jberryman/wai,sordina/wai,ygale/wai,erikd/wai,frontrowed/wai,coypoop/wai,frontrowed/wai,sol/wai,kazu-yamamoto/wai,urbanslug/wai,utdemir/wai,sordina/wai,tolysz/wai,frontrowed/wai,mfine/wai,urbanslug/wai,erikd/wai,rgrinberg/wai,jberryman/wai,beni55/wai,rgrinberg/wai,urbanslug/wai,sol/wai,beni55/wai,ygale/wai,mfine/wai,awpr/wai,rgrinberg/wai,dylex/wai,AndrewRademacher/wai,mfine/wai,jberryman/wai,sordina/wai,utdemir/wai,awpr/wai,soenkehahn/wai,awpr/wai,beni55/wai,erikd/wai,coypoop/wai,iquiw/wai,dylex/wai,creichert/wai,mfine/wai,urbanslug/wai,dylex/wai,tolysz/wai,tolysz/wai,soenkehahn/wai,creichert/wai,ygale/wai,coypoop/wai,kazu-yamamoto/wai,yesodweb/wai,coypoop/wai,frontrowed/wai,soenkehahn/wai,beni55/wai,soenkehahn/wai,iquiw/wai,iquiw/wai,sol/wai,sordina/wai,iquiw/wai,utdemir/wai,AndrewRademacher/wai,rgrinberg/wai,erikd/wai,AndrewRademacher/wai,awpr/wai,jberryman/wai,yesodweb/wai