Update hello_world_macro.bs example
Update hello_world_macro.bs example

The following changes get hello_world_macro.bs running under the latest JRuby/Bitescript:
* Invoke print and println with [void, object] instead of [Object] to get the correct signature
* ldc 0 / aload instead of aaload 0 to access the argument array
* Add a comment to make command-line usage clear

headius/bitescript