Implement a classic mvc coffeescript version

Hi, this implements the classic MVC pattern in coffeescript. Per https://github.com/fastrde/abee/issues/2

As noted in https://github.com/fastrde/abee/issues/2 - although this PR solves my current itch, a more generic approach would probably be to add a language flag b/c the design patterns are mostly the same b/w languages, it's just the content of the files and their extensions that differ so eventually you don't want to maintain the full matrix of language x pattern.

Another side note: I was not able to run  `abee collection add <collectionName1> [attributeForModel1,..,attributeForModelN]` in order to add **attributes**. I'm able to add a **new collection**, but unable to add **attributes** to this collection. So this small part of my commit was not tested. I wonder what I did wrong...