Enable dynamic construction of sub command list

[thallgren]

When using a modular environment it might be desirable to register available commands using mechanisms such as OSGi service registrations or Guice multibinding injections. This is presently not possible since there's no way of creating a SubcommandHandler with a list that is obtained at runtime.

Please add a SubCommandHandler constructor where the list of SubCommands can be passed in as an argument.

[sfuhrm]

Maybe

CmdLineParser#addOption

is what you're looking for? Can you give an example?