v2 copy endpoints

add copy endpoint inputs and outputs.  these endpoints are not implemented yet, nor are any bindings.  this allows us to update this later without having to change our api version.

Signed-off-by: Brent Baude <bbaude@redhat.com>

pkg/api/server/server.go

@@ -102,6 +102,7 @@ func newServer(runtime *libpod.Runtime, duration time.Duration, listener *net.Li
 
 	for _, fn := range []func(*mux.Router) error{
 		server.registerAuthHandlers,
+		server.registerAchiveHandlers,
 		server.registerContainersHandlers,
 		server.registerDistributionHandlers,
 		server.registerEventsHandlers,