CopyTask can now accept loaded tilelive objects.
CopyTask can now accept loaded tilelive objects.

topwood/tilelive,mapbox/tilelive,tomhughes/tilelive.js,gravitystorm/tilelive.js,Norkart/tilelive.js,paulovieira/tilelive,mapbox/tilelive.js,nyurik/tilelive.js,kyroskoh/tilelive