Some parenthesis removal

Thank you for having shared this massive list of design patterns. It is a reference.

If you allow me, I've removed unnecessary parenthesis like:
```
func = () -> callThis()
# Into
func = -> callThis()
```

CoffeeScript is so clean. Doing these patterns in JS would have been an horrific job. You rock! :wink:
Parens on instanciations

I've re-added the parens on the instanciation.

I've also removed some unnecessary double quoting in favor of single quoting. I prefer using single quotes whenever the string is constant :wink:
Merge pull request #1 from PEM--/patch-1

Thanks again. I really appreciate your help. Sorry it took so long