Rename Daemon.Get to Daemon.GetContainer.

This is more aligned with `Daemon.GetImage` and less confusing.

Signed-off-by: David Calavera <david.calavera@gmail.com>

daemon/restart.go

@@ -12,7 +12,7 @@ import (
 // stop. Returns an error if the container cannot be found, or if
 // there is an underlying error at any stage of the restart.
 func (daemon *Daemon) ContainerRestart(name string, seconds int) error {
-	container, err := daemon.Get(name)
+	container, err := daemon.GetContainer(name)
 	if err != nil {
 		return err
 	}