CLI command fix

`beluga setup` should be `beluga setup_project` as also apparent from `beluga help`: 
```
$ haxelib run beluga help
Usage:
	* help
	* setup_project project_name
	* create_module module_name
		* Must be run inside a beluga's project folder
```
Merge pull request #199 from anissen/patch-1

CLI command fix