Update copter URL in README.md
Update copter URL in README.md

dannycoates/testpilot,6a68/testpilot,6a68/idea-town,meandavejustice/testpilot,lmorchard/idea-town,chuckharmston/testpilot,fzzzy/testpilot,chuckharmston/testpilot,mozilla/idea-town,lmorchard/idea-town-server,flodolo/testpilot,lmorchard/idea-town-server,mozilla/testpilot,clouserw/testpilot,meandavejustice/testpilot,fzzzy/testpilot,lmorchard/testpilot,6a68/testpilot,fzzzy/testpilot,meandavejustice/testpilot,6a68/idea-town,meandavejustice/testpilot,mozilla/testpilot,chuckharmston/testpilot,lmorchard/idea-town,mozilla/idea-town,clouserw/testpilot,mozilla/idea-town-server,6a68/testpilot,lmorchard/idea-town,mozilla/idea-town-server,mozilla/idea-town-server,mathjazz/testpilot,flodolo/testpilot,chuckharmston/testpilot,clouserw/testpilot,lmorchard/testpilot,lmorchard/idea-town-server,mozilla/testpilot,mozilla/testpilot,fzzzy/testpilot,6a68/idea-town,lmorchard/idea-town-server,6a68/testpilot,mozilla/idea-town,lmorchard/idea-town,dannycoates/testpilot,dannycoates/testpilot,flodolo/testpilot,flodolo/testpilot,lmorchard/testpilot,clouserw/testpilot,6a68/idea-town,mathjazz/testpilot,lmorchard/testpilot,mozilla/idea-town-server,mathjazz/testpilot,dannycoates/testpilot,mathjazz/testpilot,mozilla/idea-town