Hello! I want to include functionality of your gem in mine https://github.com/ruby-talks/talks, so I started to play with it and want to improve a little bit what I think will be more comfortable in usage.
system('bla', 'bla', nil)
Notifier.notify 'bla bla'
Avoid dead threads when you forgot to pass any option to notify method
Now you can pass to growl notifier just a message to notify