Tweak LazybonesScript to accept cli args, issue #17

Tweak LazybonesScript to accept cli args.  Add new ask method to groovy-app template.  Add ask method to [README](https://github.com/pledbrook/lazybones/blob/master/README.md)

When #18 is complete, add more integration tests to thoroughly test the new ask method and add more documentation to [README](https://github.com/pledbrook/lazybones/blob/master/README.md)