Add coffeelinting

你好!

Run cake lint to run coffeelinting, configure rules in coffeelint.json. Like I mentioned in the previous pull request - it does complain about the indentation, which I think can be 'fixed' by replacing indentation with spaces instead of tabs. To my knowledge about good practices, I don't think that there's anything that should be preferred between tabs and spaces, as long as there's consistency. The problem with CoffeeLint is that it complains about something that isn't actually wrong, which causes a lot of noise when running the linting. This noise makes REAL identation mistakes practically invisible.

Take care bud!