Add runner for Elm app
Add runner for Elm app

demns/todomvc-perf-comparison,demns/todomvc-perf-comparison,gyzerok/todomvc-perf-comparison,Saulzar/todomvc-perf-comparison,hokaccha/todomvc-perf-comparison,dribba/todomvc-perf-comparison,therebelbeta/todomvc-perf-comparison,stephanebachelier/todomvc-perf-comparison,Warry/todomvc-perf-comparison,staltz/todomvc-perf-comparison,gyzerok/todomvc-perf-comparison,Warry/todomvc-perf-comparison,jiexuangao/todomvc-perf-comparison,jiexuangao/todomvc-perf-comparison,AutoSponge/todomvc-perf-comparison,AutoSponge/todomvc-perf-comparison,gaearon/todomvc-perf-comparison,landonbar/todomvc-perf-comparison,therebelbeta/todomvc-perf-comparison,staltz/todomvc-perf-comparison,gyzerok/todomvc-perf-comparison,Warry/todomvc-perf-comparison,yelouafi/todomvc-perf-comparison,hokaccha/todomvc-perf-comparison,ybybzj/m-react-todomvc-perf,stephanebachelier/todomvc-perf-comparison,dribba/todomvc-perf-comparison,yelouafi/todomvc-perf-comparison,ybybzj/m-react-todomvc-perf,gaearon/todomvc-perf-comparison,Saulzar/todomvc-perf-comparison,landonbar/todomvc-perf-comparison