added a restart method, so if you've stopped you don't have to start from the beginning again

Hi Jamie,

I just saw your project on the homepage and really liked the fact it was lightweight and native without requiring any other dependancies.

I noticed that it didn't have a restart method though, so I forked it and added one.

I've not used coffeescript in any projects before, but I have read about it and understood the syntax, so just wrote in the extra method by hand.

Hope this helps :-)


Jolyon