Structure clean up.

* Cleaning out JS and upgrade everything.
* Add Gruntfile and package.json to handle minifying things
Refactor Posts code to new structure and use marionette views.

* Should give us a working post list
* Use a marionette composite and item views for post list and items
* Make the post collection just pull results out of the json from API
* Add route and controller action for #posts
* Reformat files for tabs not spaces