Update dependencies and devDependencies

Especially, I updated CoffeeScript to v1.7.x. and fixed the path to the compiler, according to the change log of v1.7.0 (http://coffeescript.org/#changelog):

> When requiring CoffeeScript files in Node you must now explicitly register the compiler. This can be done with require `'coffee-script/register'` or `CoffeeScript.register()`. Also for configuration such as Mocha's, use `coffee-script/register`.