Cli.commandFactory is never used?

[mayanjun]

The member variable Cli.commandFactory is never used?
Generally, user call the method Cli.parse(String ...), the CommandFactory instance that installed by Cli.CliBuilder.withCommandFactory(factory) should be used instead of create a new one.

Another optimization point is that you don't have to create a new CommandFactory object every time it's called，CommandFactory instance can be created once on the calling of Cli.CliBuilder.build().